Can you help me with this one

Omar is going on a road trip! the car rental company offers him two types of cars. each car has a fixed price, but he also needs to consider the cost of fuel. the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of s0.50 per kilometer driven.

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

What are the measures of angles a, b, and c? show your work and explain your answers. 25 points