Someone can explain and teach me how to do? (Question b and c)

3. The table below shows the cost information for a perfectly competitive firm. Output Total Cost (TC) (units) Marginal Cost (MC) (RM) (RM) 0 50 80 IN DO N a UI A W 100 20 118 134 152 172 202 262 362 (a) What is the fixed cost for this firm? marks) (2 (b) marks) Compute marginal cost (MC) for each level of output. (4 (c) If the firm is able to sell all of its output at a fixed price of RM60 per unit, how profit be? many units should it sell in order to maximise its profit and how much will its marks) (6