b) Boris has borrowed $20,000 on margin to buy shares in ABC Inc., which is now selling at $40 per share. Boris' account starts at the initial margin requirement of 50%. The maintenance margin is 35%. Two days later, the stock price falls to $35 per share. i) Will Boris receive a margin call? Show your calculation. (4 marks) ii) How low can the price of ABC shares fall before Boris receive a margin call