You have been asked to set up an assembly line to assemble a computer mouse. The precedence relationships are shown below; task times in minutes are given in parentheses. There are 500 minutes of assembly time per shift and the company operates one shift each day. The required output rate is forecasted to be 50 units per shift. a. Balance the assembly line using the longest-processing-time rule. State the tasks associated with each workstation, total time, and idle time. Break ties by choosing the lowest task number. If your answer is zero, enter "0". Round your answers to the nearest whole number. b. What is the assembly-line efficiency? Round your answer to one decimal place. %