My answers are wrong, please help:

Question 1 1 points Saved A firm is producing 20 units with an average total cost of $25 and marginal cost of $15. If it were to increase production to 21 units, which of the following must occur? O Marginal cost would decrease. Marginal cost would increase. O Average total cost would decrease. Average total cost would increase.Question " Table 13-3 1 points Saved Teacher's Helper is a small company that has a subcontract to produce instructional materials for disabled children in public school districts. The owner roots several small rooms in an office building in the suburbs for $600 a meesh and has leased computer equipment that costs $140 a month Output Fond Variable Total AFC AVG ATC MC $1080 $1080 3400 $1480 $400 5965 5450 $1350 57430 $1:900 $475 4:2500 $216 $4280 $700 $4100 $5400 $135 57300 10 $10 880 O a. $109 Refer to Table 13-3. What is the average fived cost for the month if mine instructional modules are produced Ob.$120Question 5 1 points Free Answer Diminishing marginal product explains why. as a firm's output increases, which of the following is likely to occur? The production function and total-cost curve both put shooper O the production function and total-cost curve both gut flatter the production function gets steeper, while the total cost ourve gets flatter the production function gets flatter, while the total oost curve pets steeperquestion 7 Table 13-3 i points Teacher's Helper is a small company that has a subcontract to produce instructional materials for disabled children in public school districts. The owner rents several small rooms in an office building in the suburbs for $600 a month and has leased computer equipment that costs $480 a month. Output Fbond Variable Total AFC AC ATC MC $1080 31080 3400 $1480 3400 $965 5450 $2430 $1900 $475 $2800 3216 $4280 $700 $4100 $5400 5135 $7300 10 $10 080 Refer to Table 13-3. How many instructional modules are produced when the marginal cost is $1300? 047