need help with this question..

Complete the following table showing the demand for snow skiing lessons per day. Do this by filling in the values for (i), (ii), and (iii). Lessons Total Revenue Average Revenue Marginal Revenue per Day (Q) Price (P) (TR = P x Q) (AR = TR/Q) (MR = ATR/AQ) $80 $0 75 75 $75 $75 70 140 70 65 65 (i) 65 55 60 240 60 45 55 275 (ii) 35 50 300 50 25 45 315 45 15 40 320 40 (iii) (i) Total revenue for 3 lessons is $