There are $6$ steps involved in issuing the license. Individual steps time and paid per hour are given below.

Step $1$: $15$ mins, Paid per hour $12$$

Step $2$: $30$ mins, Paid per hour $12$$

Step $3$: $60$ mins, Paid per hour $12$$

Step $4$: $40$ mins, Paid per hour $12$$

Step $5$: $20$ mins, Paid per hour $16$$

Step $6$: $30$ mins, Paid per hour $18$$

Find the following.

$1.$ What is the maximum number of applications per hour that can be handled by the present configuration of the process?

$2.$ Which is the bottleneck here?

$3.$ What is a balanced line and how it may be achieved here?