Assigning values and doing math

One of the basic ways to think of R is as a very fancy calculator. But in order to

"save" and manipulate data or the result of any calculations, we need to be able to

assign variables. In order to get credit for Q$1,$ please do the following:

$1.$ First enter just a little basic math that will return a value if you run that

line of code.

$2.$ Now on a separate line, repeat this math and assign the result to a variable.

$3.$ On another separate line, repeat the math and assign it to a variable with an

$*$illegal$*$ name. Comment this line out so that it does not produce an error, but

then describe what is illegal about the variable name.