Write a Python program that uses user entered grades as integer values and calculate their

average and final semester grades. Result must be printed as a floating data type. Design your

program using the following specifications:

$1.$ You must use dynamic variables to store the grades. Do NOT use array or list for storing

the grades entered by the user.

$2.$ Assume grades are always integer and number of grades can be any integer value.

$3.$ All numbers in the output must be in floating data type.

$4.$ All grades must be displayed in one significant digit floating number.

$5.$ Class average must be displayed in two significant digit floating number.

$6.$ Final letter grade should use A: $>=90,$ B: $8089,$ C: $7079,$ D: $6069,$ F: $<60$

$7.$ Output must be nicely formatted and may look similar to the one shown below