$14.$ The fictitious Cool Air Inc, assembles three models $($A$,$ B$,$ and C$)$ of air conditioners. The production manager at the Cool Air plant wants to implement uniform production and mixed$-$model scheduling. The company has demand forecasts for $600$ units of Model A$,400$ for Model B$,$ and $100$ units for Model C next month. The plant operates $25$ days per month and has the capacity to produce $200$ air conditioners per day.

a$.$ If a mixed$-$model production schedule is used, what assembly sequence would the production manager use?

b$.$ How many times per day would the assembly sequence be repeated?