Solution: A List as a Subset of Another List

Statement

Given two lists, list1 and list2, implement a function that takes the two lists as input and checks whether list2 is a subset of list1.

A subset is a set containing only elements present in another set.

Constraints:

• $1 \leq$ list1.length $\leq 10^{3}$
• $0 \leq$ list2.length $\leq$