7.4 Code Practice: Question 2 I need help on this question and my code to get as 100% on it:

def GPAcalc(grade, weighted):
if grade. lower() == "a":
return 4
elif grade. lower() == "b":
return 3
elif grade. lower() == "c":
return 2
elif grade. lower() == "d":
return 1
elif grade. lower() == "f":
return 0
else:
return "Invalid"

print(GPAcalc(input("Enter your letter grade: "), int(input("Is it weigthed? (1= yes, 0= no)"