Christmas Express makes wreaths in batch sizes of $21.$ The cutting and assembly process takes $6$ minutes per wreath, and the decorating process time is $12$ minutes per

wreath. It takes $4$ minutes to move the wreaths from the cutting and assembly process to the decorating process.

a$.$ Compute the value$-$added, non$-$value$-$added, and total lead times of the wreath process.

Value$-$added lead time

minutes

Non$-$value$-$added lead time:

Move time

Within$-$batch wait time

Total lead time

minutes

b$.$ Compute the value$-$added ratio. Round to one decimal place.

$\%$