QUESTION A: the answer is 1.96%, but i need to know how to calculate it

11. You are creating an index for the four following stocks. Price, t=0 Price, t=1 102 112 Stock ABC DEF GHI JKL Shares (million) 100 500 1,200 450 45 50 21 26 30 26 A. What is the one day return for the index if it is price-weighted? B. What is the one day return for the index if it is market-weighted? C. Suppose that at the conclusion on t=1 trading day, stock ABC does a 2:1 stock split, what is the new divisor for your price-weighted index