6 what is the answer for this question

6. In the excel sheet below, you want the net present value to be 250 by changing discount rate, therefore, a) Set cell: $B$1, To value: 250 , By changing cell: $B$10 b) Set cell: 250 , To value: $B$1, By changing cell: $B$10 c) Set cell: $B$1, To value: $B$10, By changing cell: 250 d) Set cell: $B$10, To value: 250 , By changing cell: $B$1 e) Set cell: $B$10, To value: $B$1, By changing cell: 250