Zach is deciding how he is going to spend his day. he can go to the library or to the mall, he can walk or bike, and he can go alone or with a friend. what are all the possible ways zach can spend his day? select from the drop-down menus to correctly complete the sample set list. library, walk, alone library, , with a friend library, bike, alone library, bike, with a friend mall, walk, alone mall, walk, with a friend mall, bike, alone mall, , with a friend