1. Valid Anagram

Given two strings s and t, return true if t is an anagram of s, and false otherwise.

2. Valid Parentheses

Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.
An input string is valid if:
a. Open brackets must be closed by the same type of brackets.
b. Open brackets must be closed in the correct order.
c. Every close bracket has a corresponding open bracket of the same type.