Economic question help plz

Application 10 marks 1. The following partially completed table shows cost and revenue figures for a small firm. Complete the table, noting that price per unit is $40. (4 marks) Output Total Revenue Total Cost Marginal Cost Marginal Profit/Loss Revenue 0 $15 $40 N $70 W $90 A $100 Vi $125 $155 I 7 $195 $255 b) Determine what the optimal output is for this firm? Why is this the optimal output? (2 marks) Page 2 of 4