The following table gives information concerning finance rates (in percent) for consumer installment loans from 1990 to 1996:

a. Using 1990 as the base year, construct an aggregate index of finance rates charged by commercial banks.
b. Using 1993 as the base year, construct an aggregate index of finance rates charged by finance companies for automobile loans.
c. Suppose that in 1990 commercial banks extended $50 billion worth of new automobile loans, $125 billion worth of other consumer loans, and $225 billion worth of credit card loans. Construct a Laspeyres index of finance rates charged by commercial banks.
d. Suppose that the amounts of credit extended for automobile loans by finance companies from 1990 to 1996 are as follows:

Construct a Paasche index of finance rates charged by finance companies for auto loans.

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Finance Rates (Percent) 1990 1991 1992 1993 1994 1995 1996 Commercial Banks: New Automobiles Other Consumer Loans Credit Card Plans 11.78 .13 9.28 8.08 8.13 957 9.05 15.46 5.7 4.04 13.46 13.20 13.94 13.53 18.17 18.23 17.77 16.81 15.69 16.02 15.63 Finance Companies: New Automobiles Used Automobiles 12.54 2.4 9.93 9.47 9.80 1.19 9.89 15.99 5.9 13.80 12.78 3.5 14.47 13.54 1990 1991 1992 1993 1994 1995 1996 New Automobiles (S Billion) 75 85 97 Used Automobiles ($ Billion) 7 781 103 117 121 135 85 86 90 93