Create a variable to store the atomic weight of copper $(63\mathrm{.}55)$ without a semicolon at the end of the statement

Hit the up arrow to go back to the previously typed command, add a semicolon at the end of the statement, then hit the enter key. Observe the difference in output from the previous exercise.

Create a variable myage and store your age in it$.$ Subtract two from the value of the variable. Add one to the value of the variable. Observe the Workspace Window and Command History Window as you do this.

Create two variables to store a weight in pounds and ounces. Use who and whos to see the variables. Clear one of them and then use who and whos again.