Please help this question is hurting my brain

Solve the triangle. a = 21°, c = 105°, c = 5

Which graph represents the same relation is the sa which graph represents the same relation as the set {(-3-2)}

What is the probably of getting heads when poing a coin and getting a number greater than or equal to 5 when rolling a single diea) 1/6b) 1/3c) 1/4d) 1/12