CAN SOMEONE PLZ HELP ME WITH NUMBER 2

With steps plz

Use set buikder notation to represent the following set: {, -2, -1, 0}

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items