Go to the Car Loan worksheet, which contains details about a loan Miranda and Ricardo took out for a new car.

The worksheet contains two errors. Make sure Excel is set to check all types of errors, and then resolve the ones on the Car Loan worksheet as follows:

a$.$ Display the possible errors and solutions for cell B$2,$ and then convert it to a number.

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b$.$ Trace the precedents to the formula in cell $H7,$ which should multiply the optional extra payments by the scheduled number of payments. Correct the error.