Write a pseudocode program which performs the following task:

The program should ask the user to input $12$ numbers as an ASCII string

If the user input is $$q$,$ the program should exit

Otherwise, treat the input as the first $12$ digits of an ISBN$-13$ number

The program should check the user$$s input and print a message stating whether or not it is a valid.

Next, the program should calculate the check digit for the ISBN$-13$ number.

The program should then output the full $13$ digit ISBN$-13$ number.

The program should then repeat from step $1$

Some of the steps your program will need to perform:

Convert the ASCII characters to numeric values in order to perform arithmetic on them.

Hint: Consult an ASCII table; what is the difference between the ASCII character $1,$ and the numeric value $1?$ Is this the same for all digits $1-9?$

Check the user input for formatting errors:

Must have a length of exactly $12$

Must contain only the digits $0-9,$ no symbols or letters

Implement the $$ISBN Check$-$Digit Calculation$$ algorithm described above.