The table below gives the prices for three products (A, B, and C) for the four quarters of last year.

a. Compute a simple index for the Quarter 4 price of product A, using Quarter 1 as the base period.
b. Compute a simple index for the Quarter 2 price of product B, using Quarter 1 as the base period.
c. Compute a simple composite index for the Quarter 4 price of all three products, using Quarter 1 as the base period.
d. Compute a simple composite index for the Quarter 4 price of all three products, using Quarter 2 as the base period.

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Quarter A 3.25 3.50 3.90 4.25 1.75 1.25 1.20 1.00 8.00 9.35 9.70 10.50 3 1.00