Use the command line to create a new directory called lab9 in your labs directory. Make sure all of the .py files that you create for this activity are in that directory.
Grade Conversion
Create a Python function called convert_to_letter_grade in a file called grades.py. The function should take a numeric grade from 0 to 100 and print the associated letter grade using the following scale:
A = [90, 100]
B = [80, 90)
C = [70, 80)
D = [60, 70)
F = [0, 60)
Note that a square bracket means inclusive and a parenthesis means exclusive. Be sure to test your program on the boundaries of the ranges.
Leap Year
Create a function called is_leap_year(year) in a file called date.py. The function should return True if the specified year is a leap year, False otherwise. A leap year occurs almost every 4 years. All leap years are divisible by 4, but not all years that are divisible by 4 are leap years. Years that are divisible by 100, but not divisible by 400 are not leap years.
Days in Month
Create a function called get_days_in_month(month, year) in the date.py file. The function should return the number of days in the specified month. Months are specified as integers between 1 and 12. Use the is_leap_year function to help compute the number of days when the month is February. Also use elifs and think carefully about the order, so that the number of conditional statements is kept to a minimum.
Valid Date
Create a function called is_date_valid(day, month, year) in the date.py file. The function should return True if the specified date is an actual day in the Gregorian calendar, False otherwise. The function’s parameters should specify a date as three integers. Use the get_days_in_month function to help determine if the day input is valid.
Submission
Please show your source code and run your test cases for the instructor or lab assistant. Only a program that has perfect style, thorough test cases, and flawless functionality will be accepted as complete.