Q.5. Assume that after one time period, the value of a stock (whose present value is R80) would be either R120 or R60. Suppose that, for any y, at a cost of Cy, one can purchase at is time 0 the option to buy y shares of the stock at time-1 at a price of R90 per share. For what values of C,no-arhitragewillbepossible?(Provide ( necessary details)