Determine the present equivalent value of the cash-flow diagram of Figure P4-97 (p. 180) when the annual interest rate,i_k, varies as indicated.

Picture P4-97:

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P = ? $2,000 $2,000 $1,000 $1,000 ! = 8% i4 = 6% i6 = 10% iz = 8% iş = 6% iz = 10% 2 3 6. Years