Answers are
D= 112
E= 42
F= 26
Step by step
See attachment
D is a vertical angle to 112 so it is congruent or the same
E is a vertical angle to 42 so it is congruent or the same
F is a supplementary angle with D and E, which added together will equal 180
112 + 42 + f = 180
154 + f = 180
f = 180 - 154 = 26
f = 26