Q.1. Write a program in C++ which inputs a number from the user, and based on the number entered display the week of the day as per the following table; [Use Switch Statement] 1 - Sunday 2 - Monday 3 - Tuesday 4 - Wednesday 5 - Thursday 6 - Friday 7 – Saturday Display appropriate error message if the number is not valid.

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C++:Write a program that determines whether the user entered an item number in the required format: three digits, a hyphen, two digits, a hyphen followed by 4 alphanumerics. Display an appropriate message indicating whether the format is correct or incorrect. Use a sentinel value of -1 to end the program.  You must use at least two functions in the solution of this exercise.

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