105. consider a simple symmetric random walk on integers, where from every state i you move to i-1 and i +1 with probability half each. then which of the follow

105. Consider a simple symmetric random walk on integers, where from every state i you move to i-1 and i +1 with probability half each. Then which of the following are true? 1. The random walk is aperiodic 2. The random walk is irreducible 3. The random walk is null recurrent . The random walk is positive recurrent