Reference no: EM133037261
Please answer using Python code and provide # with explanation:
a) A Python program that accepts a list of marks then prints the letter grade and description according to the Grading System of the Chang School of Continuing Education. For example, if the user enters 90, 120, -12, 71.5, 62.5, the output would be as follows:
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Mark
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Letter Grade
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Performance Description
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90
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A+
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Excellent
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120
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Not Possible
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Not Possible
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-12
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Not Possible
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Not Possible
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71.5
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B-
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Good
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62.5
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C
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Satisfactory
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b) A code to compute and print the sum of squares of only the Excellent marks. For example, if the user enters 90.5, 120, -12, 71.3, 82.2, 62.5, then the output should be: The Excellent marks are: [90.5, 82.2] The sum of squares is 14947.09
c) A code to compute and print the Median, Average and Mode of the marks between 0 and 100, inclusively, after rounding each mark to the nearest integer. Ensure notifying the user if there is no unique mode found, as the Mode in this exercise returns only the single most common mark in the list.
For example, if the user enters 89.7, 120, -12, 90, 60.2, then the output should be: The valid marks are: [90, 90, 60] Median is 90 ; Average is 80 ; Mode is 90
However, if the user enters 90.6, 70, 100, 40.4, then the output should be: The valid marks are: [91, 70, 100, 40] Median is 80.5 ; Average is 75.25 ; No unique mode found
Also, if the user enters 65, 65, 65, 35, 35, 35, then the output should be: The valid marks are: [65, 65, 65, 35, 35, 35] Median is 50.0 ; Average is 50 ; No unique mode found
Hint: Use the [statistics] (https://docs.python.org/3.7/library/statistics.html) module as it provides functions to calculate mathematical statistics of numeric data to answer c.
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