Use Itos Lemma to evaluate d(S). For the following four problems, use Itos Lemma to determine the procedure followed by the specified equation, assuming that

Use Itˆo’s Lemma to evaluate d(√S).

For the following four problems, use Itˆo’s Lemma to determine the procedure followed by the specified equation, assuming that S(t) follows

1. Arithmetic Brownian motion, equation (20.8);

2. A mean reverting process, equation (20.9); and

3. Geometric Brownian motion, equation (20.11).