effeciencyAn operations analyst has gathered the following data on a fridge repair shop: design capacity of the shop is $120$ fridges. effective capacity of the shop is $80$ fridges, backlog in the system is $20$ fridges, actual service rate is $67$ fridges for the past month, expected capacity was $90$ fridges, capacity in the system is $30$ fridges. Required: determine the capacity efficiency of the fridge repair shop. a$)74\mathrm{.}4\%$ b$)83\mathrm{.}8\%$ c$)88\mathrm{.}9\%$ d$)66\mathrm{.}7\%$