5. The following are figures for a monopsonist employer: Number Wage Total Marginal Marginal of rate cost of cost of revenue workers (E) (2) labour labour product (1) (f) (3) (E) (4) (E) (5) 1 100 100 110 230 2 105 210 120 240 W 110 230 240 4 115 230 5 120 210 6 125 190 130 170 8 135 150 9 140 130 10 145 Fill in the missing figures for columns (3) and (4). How many workers should the firm employ if it wishes to maximise profits