1. First Cost, $ Present Worth ($) Annual Worth ($) Future Worth ($) 100,000 259,370 Maintenance and Operating Costs, $ Benefits, $ 61,446 10,000 159,374 [y] 30,722 Disbenefits, $ 40,000 5,000 637,496 [z] 27 For the table given above, calculate the followings at i = 10%. a) (10 Points) Find the useful life n. b) (10 Points) Fill in all the missing values (x, y and z) in the table. $) (10 Points) Use AW method to calculate the conventional B/C ratio. Provide a practical interpretation of this ratio