Can you please help me with these questions? I will rate helpful ?

If the cost of labor (a variable input) decreases, at all levels of output: Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. Total costs will decrease, average total costs will decrease, average variable costs will decrease, and marginal costs will a decrease in the short run. b Total costs will decrease, average total costs will decrease, average variable costs will decrease, and marginal costs will remain the same in the short run. Total costs will decrease, average total costs will decrease, average variable costs will remain the same, and marginal C costs will remain the same in the short run. d Total costs will decrease, average total costs will remain the same, average variable costs will remain the same, and marginal costs will remain the same in the short run.Consider the table, which represents the short-run relationship between the number of units of labor hired, the total units of output, and the total Labor Input Total Output Total Cost cost of production. The average variable cost of producing 38 units of 0 0 $500 output is: 20 $700 2 38 $900 54 $1100 4 66 $1300 Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a $10.53 b $23.68 C $13.16 d $200.00In this table, diminishing marginal productivity first becomes evident when the firm employs which worker? Labor Input Total Output 0 0 20 2 44 Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Worker number 2 b Worker number 3 C Worker number 4 d Worker number 5