Question: write a program that reads 30 grades from a file(grades.txt) the program that uses three functions to calculate the average,the standard deviation and grade range

write a program that reads 30 grades from a file(grades.txt) the program that uses three functions to calculate the average,the standard deviation and grade range frequency for 30 grades

the grades are x = [57,94,81,77,66,97,62,86,75,67,91,78,61,82,74,72,70,88,66,75,55,66,58,73,79,51,63,77,52,84]

grade range frequency = [50-59 . 7,

60-69 6,

70-79 2,

80-89 . 10,

90-99 . 5]

it has to be in python language.

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