need the answer solver by the formula

1. First Cost, s Maintenance and Operating Costs, $ Benefits, $ Present Worth ($) Annual Worth ($) Future Worth (S) 100,000 [x] 259,370 61,446 10,000 159,374 [y] 30,722 40,000 5,000 637,496 [z] Disbenefits, $ For the table given above, calculate the followings at i 10%. a) (10 Points) Find the useful life n. b) (10 Points) Eill in all the missing values (x, y and 2) in the table. $) (10 Points) Use AW method to calculate the conventional B/C ratio. Provide a practical