A small company identifies the following independent alternatives as follows: Alternative Initial Cost IRR Project A. $20,000 15% Project B $10,000 24% Project C $10,000 11.5% Project D $25,000 30% Project E $35,000 20% The company can obtain funding at the following cost of capital: 10% for the first $40,000, 11% for the next $30,000, and 12% for next $30,000. a) What is the optimal investment capital? Also what should be the investment strategy under this optimal budget and what is the corresponding minimum attractive rate of return (MARR) for the company? b) If the company set the investment budget not to exceed $85,000, what should now be the investment strategy and the corresponding MARR?