Q$14-$ You are given the following information regarding prices for a sample of stocks.

a$.$ Construct a price$-$weighted index for these three stocks, and compute the percentage

change in the index for the perod from $T$ to $T+1.$

b$.$ Construct a value$-$weighted index for these three stocks, and compute the percentage

change in the index for the perod from $T$ to $T+1.$

c$.$ Briefly discuss the difference in the results for the two indices. You purchased $100$ shares of common stock on margin at $$40$ per share. Assume the initial margin is $50\%$ and the stock pays no dividend. What would the maintenance margin be if a margin call is made at a stock price of $$25?$ Ignore interest on margin.