I need help with C and D please.

Thank you.

Exercise 5-4 Redlands Air, Inc. charges $75 per hour for flight instruction. The company has $25,000 of annual fixed administrative costs, and pays $15,000 rental expense to the Inland Empire Airport each year. Redlands Air, Inc. incurs a $20,000 annual insurance premium to insure its aircraft and facilities. In addition, the company gathers the following variable cost data per hour of flight instruction: $30 Instructor's salary Fuel Maintenance Required: a. Compute Redlands Air, Inc.'s breakeven point in hours of flight instruction (round up to the next whole hour). Determine the amount of revenue it needs to breakeven. b. Calculate the number of flight hours and amount of revenue the firm needs to generate income of $40,000. c. Calculate the number of flight hours and amount of revenue the firm needs to generate a 10% profit margin. d. Verify your calculations by preparing contribution margin income statements for a-c above. 5.12 CVP and Sensitivity Analysis Managers often measure the impact of alternative assumptions about costs and sales price on breakeven points and profitability. Such sensitivity analysis allows management