The Mach $10$ is a one$-$person sailboat manufactured by Creative Leisure. The final assembly plant is in Cupertino, California. The assembly area is available for production of the Mach $10$ for $200$ minutes per day. $($The rest of the time it is busy making other products.$)$ The daily demand is $56$ boats. Given the following information:

b$)$ The operating efficiency of the assembly line with $5$ workstations shown in the figure

chosen above $=\%($enter your response as a percentage rounded to one

decimal place$).$