Christmas Express makes wreaths in batch sizes of $35.$ The cutting and assembly process takes $3$ minutes per wreath, and the decorating process time is $10$ minutes per wreath. It takes $5$ 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.

$\%$