CCCC has agreed to sell you a slightly used mustang for $10000. you agreed to make a $2000 down payment and weekly payments of %=$150 for two years beginning next week. what is the effective annual rate of this loan?

The professor says the answer is 112.42%. I calculated the APR i believe by: n=104 (2x52), PV=8000 (10000-2000), PMT=-150, and found i/y=1.459520667 * 52 =75.8951. i believe that is the APR but now i need to find the EAR for the question.

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