Now we're going to write some blocks that utilize predicates like and, or, and not.

• Write a block that reports whether a given day is a weekend. Let's assume that only Saturday and Sunday are part of the weekend.
• Write a block. You could write this with or without your block, but it'll be much easier if you do.
• Here is a block definition. Give it a more descriptive name, then re-write using no if blocks.