Probability practice , please showMe how to do it

1. There are 8 different kinds of cheese packages. In how many ways can these packages be arranged on a shelf if: ---They can be arranged in any order, except: a specific given package must always be on the left of the shelf? ---Five specific packages must be together in a specific order? ---Packages #1, #2 and #3 must be placed on the left side of the shelf (they can be placed in any order)? ---Five of the packages got "stuck" together (i.e., there is no way to separate them)? ---Six kinds of the cheese happened to be identical