How to show three labels and spinner just below my textbox?

I am working with android and I have designed my xml in which I am showing three buttons at the bottom of my screen and also I am showing a textbox (textboxA) at the center of my screen along with three buttons at the bottom of the screen.

Now I would like to show three labels and three spinners just below the textboxA Is possible to do? I tried using the below code but some of my labels and spinners are off

textboxA

labelA: SpinnerA
labelB: SpinnerB
labelC: SpinnerC

Below is my xml layout -

<RelativeLayout xmlns:android="http://ift.tt/nIICcg"
xmlns:tools="http://ift.tt/LrGmb4"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_alignParentLeft="true"
    android:orientation="horizontal" >

    <Button
        android:id="@+id/button1"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="ButtonA" />

    <Button
        android:id="@+id/button2"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="ButtonB" />

    <Button
        android:id="@+id/button3"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="ButtonC" />
</LinearLayout>

<EditText
    android:id="@+id/edittext"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_centerVertical="true"
    android:ems="10"
    android:hint="textboxA"
    android:inputType="text" >
</EditText>

<TextView
    android:id="@+id/text_view_1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:text="Radius1: " />

<Spinner
    android:id="@+id/spinner1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/edittext"
    android:layout_centerHorizontal="true" />

<TextView
    android:id="@+id/text_view_2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:text="Radius2: " />

<Spinner
    android:id="@+id/spinner2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/edittext"
    android:layout_centerHorizontal="true" />

<TextView
    android:id="@+id/text_view_3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:text="Radius3: " />

<Spinner
    android:id="@+id/spinner3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/edittext"
    android:layout_centerHorizontal="true" />

Is there anything wrong I am doing here?