Ch 1 - variation on 19 Create two variables x and y and store numbers in them. Write an expression that would be true if the value of x is less than or equal to 5 or if the value of y is greater than or equal to 20, but not if both of those are true (and not true if neither is true). Change the values in the variables and test the expression again - do this until all 4 combinations of T/F have been tested