What are the values of c and f?

A: c = 15/2 ; f = 9/2
B: c = 9/2 ; f = 15/2
C: c = 13/2 ; f = 9/2
D: c = 15/2 ; f = 16/3

Geometry B:Q Unit 2 Lesson 5 Quiz
NEED HELP PLEASE