this is python questions

Q2: Find the errors in the following if statements a. if x>0 then b. if 1x > x ** sqrt (2): C. if x-1; d. xStr input("Enter an integer value") print(x) if xStr.isdigit) sUm SUM+X else print("Bad input for x") e. letterGrade"F" if grade 90 if grade80 if grade 70 if grade > 60 : letterGrade "A" letterGrade "B" TetterGrade- "" letterGrade"D