1. The problem asks to find the values of $a$ and $b$ given the set notation ${a,b}$. 2. However, the input does not specify any equations, expressions, or conditions involving $a$ and $b$. 3. Without additional information, it is impossible to determine specific values or relationships between $a$ and $b$. 4. Please provide more details or equations involving $a$ and $b$ to solve the problem.