1. Suppose that x, y, and z are int variables, and x = 15, y = 10, and z = 20. Determine whether the following expressions evaluate to true or false:

(z - 20 == 0) || (x == y - 2) && (y == z)

2. Suppose that str1, str2, and str3 are string variables, and str1 = "Polish", str2 = "iTALIAN", and str3 = "German". Determine whether the following expressions evaluate to true or false: a. str1 >= str2 b. str1 != "Polish" c. str3 < str2 d. str2 <= "Polish"