Motors are assembled in a process with a single resource. There are two types of motors. The resource$$s processing time for the first type is $8\mathrm{.}9$ minutes and demand for this type is $2\mathrm{.}3$ motors per hour. The resource$$s processing time for the second type is $40$ minutes and demand for this type is $4\mathrm{.}1$ motors per hour. There are $3$ workers at this resource.