In python language, modify the following code to allow for weighted classes

def GPAcalc(letterGrade):

letterGrade = letterGrade.lower()

if letterGrade=='a':

return 4

elif letterGrade=='b':

return 3

elif letterGrade == 'c':

return 2

elif letterGrade == 'd':

return 1

elif letterGrade == 'f':

return 0

else:

return "Invalid"

def main():

letterGrade = input("Enter your Letter Grade: ")

print("Your GPA score is:",GPAcalc(letterGrade))

main()

Add a parameter weighted (1 = yes, 0 = no) and then return the correct number for the GPA. Weighted classes get one extra point on the GPA value.

Input: Letter Grade	Expected output: Non-weighted GPA value	Expected output: Weighted GPA value
A	4	5
B	3	4
C	2	3
D	1	2
F	0	1
Anything else	Invalid	Invalid

Sample Run 1

Enter your Letter Grade: B

Is it weighted? (1 = yes, 0 = no) 1

Your GPA score is : 4

Sample Run 2

Enter your Letter Grade: B

Is it weighted? (1= yes, 0= no) 0

Your GPA score is: 3

Sample Run 3

Enter your Letter Grade: a

Is it weighted?(1 = yes, 0 = no) 0

Your GPA score is : 4