A multiset is a collection of objects, just like a set, but can contain an object more than once (the order of the elements still doesn’t matter). For example, $\{1,1, 2, 5, 5, 7\}$ is a multiset of size 6.

1. How many sets of size 5 can be made using the 10 numeric digits 0 through 9?
2. How many multisets of size 5 can be made using the 10 numeric digits 0 through 9?