The boolean constants in Python are True and False, and the operators for combining boolean expressions are and, or, and not. If <<expr1>> and <<expr2>> are two boolean expressions, then:

• the boolean expression <<expr1>> and <<expr2>> evaluates to true exactly when both <<expr1>> and <<expr2>> evaluate to true, and evaluates to false otherwise;
• the boolean expression <<expr1>> or <<expr2>> evaluates to true when at least one of <<expr1>> and <<expr2>> evaluate to true, and evaluates to false otherwise; and
• the boolean expression not <<expr1>> evaluates to true exactly when <<expr1>> evaluates to false, and vice-versa.

What do you think the order of precedence is between and, or and not? You can check the answers by extending your program in expressions.py to print out the result of evaluating the following boolean expressions.