Why is my code wrong? Python question

Question

Guys can anyone tell what is the mistake i did in this program code for finding the total marks obtained in three subjects?(Thanks!)

mark1=float(input(“Enter the marks obtained in first subject:”))
mark2=float(input(“Enter the marks obtained in second subject:”))
mark3=float(input(“Enter the marks obtained in third subject:”))
Total=mark1+mark2+mark3
print(“The total marks obtained is”,Total)

—->(when I try to execute this, it shows error in ouput)