See image below. Answer a,b, and c correctly in order to get crowned.

Answer:
A) 267
B) 340
C) 96
Step-by-step explanation:
A
Add the number of students who either drink neither or only coffee.
188 + 79 = 267
B
Add all three numbers except the one outside of the diagram (79)
96 + 56 + 188 = 340
C
Just look at the number in the 'drink tea' circle. 96