Hello, I needed help with this problem

(fixed/mixed/variable costs) Generic Motors incurs three types of costs (a, b and c) in its manufacturing process. The following table presents total costs for each type for two different activity levels:

	(a)	(b)	(c)
5,000 units	$15,000	$70,000	$45,000
7,500 units	$22,500	$85,000	$45,000

Identify whether it isfixed, mixed or variable? Cost a

Identify whether if it is variable, fixed, or mixed?

Cost b

Identify whether if it is variable, fixed, or mixed?

Cost c