please explain all questions

Question 1. (25 marks) a) What goal should always motivate the actions of the firm's financial manager? b) Why would an investor be willing to pay $80.45 today in exchange for a promise to receive $100 in the future? I c) Explain the effects depreciation has on both the cash flows and the statement of comprehensive incomes of a firm. c) Explain the effects depreciation has on both the cash flows and the statement of comprehensive incomes of a firm. I d) Consider that you are a finance manager, and one of your junior staff wanted an explanation of the term internal growth rate. Provide a definition that conveys what the term means from a finance perspective. e) What happens to the future value of a perpetuity if interest rate increases