Write a Python program that reads from a file, scores.txt, a list of test scores. Each line in the file  contains one score. The program should calculate the average of all the scores, print to screen. The  program should also have a function, num_passing, that takes as a parameter the list of grades and  returns the number of scores that are above 64 For example if scores.txt contained the following: 72 80 98 76 64 34 90 85 55 printed to screen should be:  the average is 72 6 scores above 64

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Variables and Constant

Constants and variables are widely used in mathematical equations and expressions. They are also commonly found in the domain of programming, where each language has its own way to differentiate between a constant and a variable. Since they have all sorts of applications, knowing their differences is a good place to start.