write a simple python code to simulate single bank queue system $($one teller$)$ where Customer Arrival Times: Customers should arrive at the bank based on a uniform distribution between $1$ to $5$ minutes.

and Service Times with Probabilities below:

$3$ minutes service time with a probability of $30\%.$

$5$ minutes service time with a probability of $50\%.$

$7$ minutes service time with a probability of $20\%.$

Simulation Scope: The simulation should cover the arrival and service of $100$ customers.

Prepare your simulation environment, setting initial conditions including the simulation clock, customer queue, and teller status $($busy or idle$).$

the output is Metrics Calculation:

Average Waiting Time: Total waiting time divided by the number of customers.

Count of Waiting Customers: Total number of customers who had to wait.

Average Teller Idle Time: Total idle time divided by the duration of the simulation or the number of idle periods.

please be sure of this code has queue $($fifo$)$ and submit the complete source code of the simulation, including comments to explain the implementation logic $($please explain each line of the code what does it do$)$