Study the following figure and answer the questions given below.

1. 

By which letter, the married teachers who live in joint family are represented ?

A. R
B. Q
C. S
D. P

2. 

By which letter, the married people who live in joint family but not are school teachers are represented ?

A. R
B. U
C. S
D. P

3. 

By which letter, the people who live in joint family but are neither married nor teachers are represented ?

A. T
B. R
C. Q
D. S