Read in two integers from the user: a lower end of a range and an upper end of a range. Check if the numbers are valid $($lower cannot be greater than upper$).$

If the numbers are invalid, use a loop to ask for new numbers. Continue looping until you get two valid values.

Part Two: Calculate the Sum $(5$ points$)$

Use a loop to calculate the sum of all values from lower $($inclusive$)$ to upper $($inclusive$).$ Output the sum to the user.

Part Three: Analyze the Sum $(5$ points$)$

Determine if the sum is even or odd.

Determine if the sum is positive, negative, or zero.

Output this information to the user.

Part Four: Calculate the Average $(5$ points$)$

Calculate the average of all numbers in the range from lower $($inclusive$)$ to upper $($inclusive$).$