at a wedding reception the bride and groom and three attendants will form a receiving line. How many ways can they be arranged in each of the following cases?

1.) in how many ways can the receiving line be formed if any order will do?

2.) in how many ways can the receiving line be formed if the bride and groom must be in the last 2 lines?

3.) in how many ways can the receiving line be formed if the groom must be last in line with the bride next to him?