Question: a. An elf, a dwarf, a hobbit, a wizard, and a man are sitting in a line. How many different ways can they sit if

a. An elf, a dwarf, a hobbit, a wizard, and a man are sitting in a line. How many different ways can they sit if the elf and the dwarf insist on sitting next to each other?

b. Find the number of ways eight people can be seated in an eight-passenger van.

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