R3. What is the value of each variable after the if statement? a. n-1 if k0 and if x0: elif y > 0: s s1 R3.3 Find the errors in the following if statements. a. if x 0 then print(x) b. if 1+x> *sqrt(2): d. xStr input("Enter an integer value") xint(xStr) if xStr.isdigito: sum else print("Bad input for x") e. letterGrade "F" if grade90 letterGrade "A" if grade -80 etterGrade"8" letterGrade"C" letterGrade"D" if grade 70 if grade 60<>