1. Find how much a stock would move given a

2. Find the probability of an up movement in a binomial model (proby(u)=(a-d)/(u-d). Given that the time period between nodes is 0.56 part of a year, the stock has a standard deviation of 24.5%, and the risk-free rate is 0.65%. 

3. Find the probability of a down movement in a binomial model give the probability of an up movement is 67.22%.