1? Only 38-10-10-6 =12 people chose Japanese.

There are 58-10-10-12 = 26 people who only choose French.

Only 52- 12- 10-6=24 people chose german.

12 people choose French and German at the same time.

You'd better draw a picture of this problem. It's simple. I won't draw for you. Draw it yourself. You can't ask me online.