A time study was conducted on a task that consists of four elements. The observations and performance ratings for six cycles are

shown In the following table.

a$.$ Calculate the average time for each element. $($Round the final answers to $2$ decimal places.$)$

b$.$ Calculate the normal time for each element. $($Round the final answers to $3$ decimal places.$)$

c$.$ Assuming an allowance factor of $14$ percent of workday, calculate the standard time for this task. $($Round the final answers to $2$

decimal places.$)$