Activity analysis Farrah Westin plans to build a concrete walkway for her home during her vacation. The following schedule shows how project time will be allocated: Activity Hours 8 Purchase materials Obtain rental equipment 3 Remove sod and level site 36 Build forms for concrete 16 66 Mix and pour concrete into forms 8 Level concrete and smooth Let dry 11 38 Remove forms from concrete 3 Return rental tools Clean up 2 6 a. How much of the total time is value-added time? hours b. How much total time is spent performing non-value-added activities? c. Calculate the manufacturing cycle efficiency. Note: Round the percentage to one decimal point (i.e. show 14.445% as 14.4%). % hours