Can someone help me please ?

OceanGate sells external hard drives for $288 each. Its total fixed costs are $45 million, and its variable costs per unit are $173. The corporate tax rate is 41%. If the economy is strong, the firm will sell 2 million drives, but if there is a recession, it will sell only half as many.

a. What will be the percentage decline in sales if the economy enters a recession? (Negative value should be indicated by a minus sign. Round your answer to 2 decimal places.)

b. What will be the percentage decline in profits if the economy enters a recession? (Negative value should be indicated by a minus sign. Round your answer to 2 decimal places.)

c. Calculate the operating leverage of this firm? (Round your answer to 2 decimal places.)