$($Two Workstations$)$ Suppose a process contains two workstations that operate with no buffer between them. Q$10\mathrm{.}5$ Workstation B Workstation A Now consider the three possible scenarios below: Processing Time of Workstation B Processing Time of Workstation A Scenario Scenario $15$ minutes $5$ minutes Scenario $24$ minutes or $6$ minutes equally likely minutes or $5$ minutes equally likely $5$ minutes Scenario $35$ minutes a$.$ Which of the three scenarios will have, on average, the highest flow rate? b$.$ Which of