Write a program to simulate a vending machine with the

following characteristics:

$-$ The machine sells sodas, and a soda is $15$ cents.

$-$ The machine does not provide change.

$-$ The user is expected to provide either Dimes or Nickels.

$-$ The machine can be in one of the following states:

$-$ State $1$: No coins

$-$ State $2$: $5$ cents $($N$)$

$-$ State $3$: $10$ cents $($D$)$

$-$ State $4$: Dispensing soda

$-$ Your program should ask for a coin and show the current

state of the machine. Also, you need to display the moment

when a soda is being dispensed. Your need to draw and

implement the corresponding state machine to implement