Gubser Welding, Inc., operates a welding service for construction and automotive repair jobs. Assume that the arrival of jobs at the company's office can be described by a Poisson probability distribution with an arrival rate of two jobs per $8-$hour day. The time required to complete the jobs follows a normal probability distribution, with a mean time of $3\mathrm{.}3$ hours and a standard deviation of $2\mathrm{.}2$ hours. Answer the following questions, assuming that Gubser uses one welder to complete all jobs.