solve the following counting problems: (a) a spider has one sock and one shoe on each of its eight legs, in how many different orders can the spider put on its socks and shoes? (assume that a shoe must be on top of a sock). (b) an elevator starts at the basement with 10 people and discharges them all by the time it reaches the top ??oor, number 6. in how many ways could have the people get o?? the elevator if it only ma??ers the number of people that le?? on each ??oor?