Assume each share costs $10. Recalling you have an initial investment of $20000 funded by a 50% margin loan. (a) If the MMR is 30% at what share price will you receive the margin call? (Assume no interest on the margin loan) (6%) (b) If the margin loan has an interest rate of 5% and the initial share price was $400 what is the IRR when the price rises to $470? (6%) (c) If you do not take the margin loan you can only buy half the number of shares but do not have a margin loan to repay. What is the IRR for such an investment? (6%)