Create a program that translates a letter grade to a numeric grade. a=4, b=3, c=2, d=1, f=0 the user may enter a+ or a- following the grade. "+" increases the numeric value by 0.3, while "-" decreases the numeric value of the grade by 0.3. (note: there is no f+ or f-, however a+ has value of 4.0) ask the user for a letter grade enter a letter grade : start by creating the logic to assign the correct numeric grade values to the grades (without having a + or a -) and test that the output value is as expected. (note: your program must accepts both upper case and lower case input ! ) do not hard code the test conditions like "a+", "a-"….."d-", "f" , but rather use string operation and add the extra logic to address "+" or "-" behind a the output of the program shall be the numeric value is x. x where x. x is the result.