1. Write a C# console program code to inputs five numeric values from a user, and calculate and outputs the sum, min, max, range, and the average for the five values. User input should be validated: define and use a function to accomplish this
2. In a console app, a user will enter a string. The string should consist of only numbers (numeric digits). Write the code to check this is the case. Note the string may be thousands of digits long and may start with leading 0s.