Question 3(20 points) Note: A solution without detailed explanation/calculation will only get no more than 1 point. A local bakery is scheduling routine maintenance for seven pieces of equipment. A single technician is available to perform the tasks, one at a time. The bakery wants to minimize average completion time to reduce production downtime. The estimated maintenance durations are: \begin{tabular}{l|c}\hline Equipment & Maintenance Time (hours)\\\hline Dough Mixer & 4\\ Oven & 7\\ Bread Slicer & 3\\ Icing Machine & 2\\ Proofing Cabinet & 6\\ Cookie Depositor & 5\\ Dishwasher & 1\\\hline \end{tabular} Using the Shortest Processing Time (SPT) rule, determine the order in which the technician should perform maintenance. Then, calculate the average completion time.