I NEED HELP NOW!!!!

Which statements can be used to write an algebraic expression to represent the phrase?

the product of a number and eighteen

Check all that apply.
1.Replace “a number” with a variable.
2.Product represents addition.
3.Product represents multiplication.
4.The coefficient is 18.
5.The correct algebraic expression is 18t.
6.18 is a variable.
7.The correct algebraic expression is StartFraction t Over 18 EndFraction.