An MTF margin call

You buy ₹8 lakh of an F&O Group I stock under MTF, paying 50% and funding the rest at 14% a year (simple interest). The applicable margin is $m = 27.5\%$. (a) What fall triggers a margin call if interest is ignored? (b) What fall triggers it after 90 days, including interest? (c) At day 90 the stock is 35% below your purchase price. Compute the cash shortfall and the value of stock you must sell to cure the call by selling.