Question $25(1$ point$)$

A production process is shown in the figure above. The drilling operation occurs separately from, and simultaneously with the sawing and sanding operations. Welding starts when both drilling and sanding operations have been completed. After welding, a product needs to go through only one of the three assembly operations $($the operations are in parallel, where parallel lines perform the exact same operation$).$

Currently, the production process generate outputs at the rate of $1\mathrm{.}0$ units$/$hour$.$ What is the utilization of one of the "Assembly" stages?