Exercise 1 (15): If you have a question about whether something is legal, and what happens if it is not, a good way to find out is to ask the compiler. Answer the following questions by trying them out. What happens if you invoke a value method and don't do anything with the result; that is, if you don't assign it to a variable or use it as part of a larger expression. What happens if you use a void method as part of an expression? For example, try System.out.println("boo!") + 7