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Demonstrate the concept of equivalence using the different loan repayment plans described below. Each plan repays 69 thousand dollars of loan in 5 years at 10% interest per year, please draw the cash-ow diagram for each plan. P121111: Simple interest, pay all at the end. P121112: Simple interest, pay annually, principal repaid in the end. P121113: Compound interest, pay all at the end. P121114: Compound interest, and uniform portion of principal repaid annually