You have opened a new account to sell short 1,000 shares of Nicola stock at $100/shr. Initial margin ratio was 60% and maintenance margin ratio is 40%. [Ignore stock loan fees.] Initial price $100/shr 10am Current price $110/shr 2pm (Now) Closing price* $115/shr 3:30pm [i] What is the threshold level of the closing price, at which a margin call is to be triggered? [ii] Since share price is rising, you want to reduce the size of your short position now (at $110/shr) to avoid margin call after market close. If your target level of the maintenance margin ratio at close (your estimate*: $115/shr) is 45% (or above), how many shares do you need to buy back now (at $170/shr) at least