I need help with part B the labor productivity between week 1-4.

At Symtecks, the output of a process is valued at $90 per unit. The cost of labor is $45 per hour including benefits. The accounting department provided the following information about the process for the past four weeks: Units Produced Labor ($) Material (S) Overheads ($) Week 1 Week 2 Week 3 1.127 1.314 1,096 12,334 14.842 10.653 20.752 24.473 20 442 9.165 10.430 8.736 Week 4 985 9.476 18.414 7.848 a. The multifactor productivity ratio for week 1 is 2.40 . (Enter your response rounded to two decimal places.) The multifactor productivity ratio for week 2 is 2.38 . (Enter your response rounded to two decimal places.) The multifactor productivity ratio for week 3 is 2.48 . (Enter your response rounded to two decimal places.) The multifactor productivity ratio for week 4 is 2.48 . (Enter your response rounded to two decimal places) b. The labor productivity for week 1 is units per hour. (Enter your response rounded to two decimal places.)