Answer Happy

Please help to solve this probability problem. The numbers on
the line (excluding the question numbers like 1. 2. 3.) are the
final correct answers (for this question, the correct answers are
0.00 and -1.11 respectively). Please give detailed steps to explain
how to get the final correct answer. Thanks!
6. Fill in the blanks A fair dice is rolled 20 times. Let X denote the number of 1's that occur. Let Y denote the number of 5's or 6's that occur. Cov(X,Y) = 1.-1.11 = (2 decimal places)

7. Fill in the blanks A fair dice is rolled twice. Let X denote the sum of the two values, and let Y denote the first value minus the second value. Cov(X,Y)= = 1.0.00 (2 decimal places)