Assume that an investor buys 100 shares of stock at $38 per share, putting up a 75% margin. a. What is the debit balance in this transaction? b. How much equity funds must the investor provide to make this margin transaction? c. If the stock rises to $55 per share, what is the investor's new margin position? a. The debit balance in this transaction is $ (Round to the nearest dollar.) b. The amount of equity funds the investor must provide to make this margin transaction is $ (Round to the nearest dollar) c. If the stock rises to $55 per share, the investor's new margin position is %. (Enter as a percentage and round to two decimal places.)