Question: Problem #1: [30 pts] Write a program that prompts the user to enter a positive integer number n. The program then calculates the following sum:

Problem #1: [30 pts] Write a program that prompts the user

Problem #1: [30 pts] Write a program that prompts the user to enter a positive integer number n. The program then calculates the following sum: n+ (2*n) + (3*n) + (4*n) + (5*n) + ... + (n*n). In case the user enters a negative number, the program should output an error message "Invalid Input!" Sample run 1: Enter a positive integer: 4 The sum of the series is 40 Sample run 2: Enter a positive integer: -4 Invalid Input

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