Identify the class of lever of these common household items…

Identify the class of lever of these common household items as either first-class, second-class, or third-class levers. Simply write the number of each item and then the class beside it (number, class). 1.    nut cracker 2.    pliers 3.    scissors 4.    bicycle crank (the part you pedal!) 5.    barbecue tongs