Three months ago, you purchased 500 shares of PQU stock on margin at $40/share. The initial and maintenance margins are 60% and 45%, respectively. Your broker charges you a 4% annual interest rate on borrowed funds. You've received a $2 dividend per share over the course of your investment. PQU trades for $37/share today. Find your current margin. Round intermediate steps and your final answer to four decimals and enter your answer in decimal format

b/ Find the lowest price that PQU can trade for before you receive a margin call

c/ Find your ROIC if you choose to close your margin position today. Round intermediate steps and your final answer to four decimals and enter your answer in decimal format