please I need detailed workings to compare with my answers here. I will rate you 100% if you get them right.

On 1 May, Heloise opened a margin account, buying 400 shares of ABC Company stock for GHS 33 per share. Her initial margin requirement was 55%, and the maintenance margin is 25%; At what stock price will Heloise receive a margin call (assuming that Heloise borrowed as much as possible to open the account)? On 1 June, ABC's stock price fell to GHS 15, and Heloise received a margin call. She decided to fulfil the margin requirements by depositing cash in her account. How much cash must Heloise deposit if she is required to restore the margin of 55%