OUTPUT	TOTAL COST
0	45
1	54
2	62
3	69
4	75
5	82
6	90

Part 1: The TVC of producing 4 units of output is

Part 2: The AFC of producing 6 units of output is:

Part 3: The marginal cost of producing the fifth unit of output is:

Part 4: The ATC of producing 5 units of output is: