1) What will the code display ? mystring = 'abcdefg' print(mystring[3:]) 2) What will the following code display? numbers = [1,2,3,4,4] my_list = number[:1] print(my_list) 3) How do you find the length of a string? 4) Is the following assignment statement valid or invalid? If it is valid, why? 72 = amount