A robot performs a loading and unloading operation for a machine tool. The work cycle consists of the following sequence of activities: \begin{tabular}{|c|l|c|} \hline Seq. & Activity & Time (s) \\ \hline 1 & \begin{tabular}{l} Robot reaches and picks part from incoming conveyor and loads into fixture on machine \\ tool. \end{tabular} & 5.6 \\ \hline 2 & Machining cycle (automatic) & 35.3 \\ \hline 3 & Robot reaches in, retrieves part from machine tool, and deposits it onto outgoing conveyor. & 4.8 \\ \hline 4 & Move back to pickup position & 1.6 \\ \hline \end{tabular} The activities are performed sequentially as listed. Every 38 workparts, the cutting tools in the machine must be changed. This irregular cycle takes 3.6min. to accomplish. The uptime efficiency of the robot is 95%, and the uptime efficiency of the machine tool is 97%, not including interruptions for tool changes. These two efficiencies are assumed not to overlap, i.e., if the robot breaks down, the cell will cease to operate, so the machine tool will not have the opportunity to break down; and vice versa. In other words, the robot's and the machine's downtimes do not happen at the same time. Downtime results from electrical and mechanical malfunctions of the robot, machine tool, and fixture. Determine the hourly production rate ( pc/hr,2 decimal points), taking into account the lost time due to tool changes and the uptime efficiency