please help me with part B of the questions

PART A Wholesalers of roses (the firms that supply flower shops with roses for Valentine's Day) sell roses in containers that hold 120 stems. In Australia, wholesalers operate in a perfectly competitive market. The table below is a cost schedule for one wholesaler - Valentine Roses Co.: Quantity Total cost [$] [containers per week] 30 1 40 2 52 3 66 82 5 100 6 120 7 142 8 166 a) Suppose the market price of roses is $15 per container. What is the profit- maximising quantity Valentine Roses Co will sell and what profit will it earn? Explain your answer. b) Draw the short run supply curve for Valentine Roses Co. Explain how you derived the supply curve. PART B Now assume that the cost schedule for Valentine Roses Co. as shown in Part A above is the one that the firm uses in the long run. a) In long run equilibrium, what would be the price per container of roses and what quantity of containers of roses will Valentine Roses Co sell? Explain how you arrived at this result. b) Suppose all other firms in the wholesale rose industry are identical to Valentine Roses Co. In long run equilibrium, how many firms will operate in the industry? 17 The market demand for roses is: Price per container 14 16 18 20 22 ($ Market demand 280 240 200 160 120 [containers per week]