i need the solution for point c and d only

Moving to another question will save this response. Question 1 An investor opens a brokerage account and purchases 300 shares of ABC Corp. at $ 50. To lend him money, the broker requires that the equy 340.000. The curtain Explain the buying dn margin and in which case it will be profitable b. Compute the original margin? If the share price falls to 30 and the maintenance maren is 30, wil the investor recebe a marginal? d. How low can ABC Corp. price fall before the investor get a margin call