Sam bought 100 shares of Ultra Ltd at $60 each using her margin account on 10 January 2022. The broker requires an initi

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Sam bought 100 shares of Ultra Ltd at $60 each using her margin
account on 10 January 2022. The broker requires an initial margin
of 50%, a maintenance margin of 30% and charges 8% interest pa.
I) Calculate Sam’s initial equity on 10 January 2022. 1 mark If
on 11 January 2022 the share price dropped to $55, what was the
actual margin on Sam’s account? Did she get a margin call? 3
marks
II) Ignoring all costs calculate the share price at which there
will be a margin call made by the broker. 4 marks
III) If Sam sold the shares on 11 January 2022, what would have
been her percentage return? Ignore all costs. 2 marks
IIII) Now assume Sam bought the shares with only her own money.
Ignoring all costs, what would have been her percentage return if
she sold the shares on 11 January 2022? Is it different than the
answer to d? If so explain why