The joint PMF of two discrete random variables and is given in the table. Find the value of . The solution shown in the screenshot contains blanks and .
Consider the following options for the blanks: (1) , (2) , (3) , (4) , (5) , (6) , (7) , (8) , (9) , (10) , (11) , (12) . Enter only the correct option number for each blank.