Rey is considering buying shares of twa stock. the stock currently sells for $50 per share. the stock changes in value at 9: 00 am each day, either increasing in value by $11 or decreasing in value by $13. the stock will increase in value with 40% probability, and decrease in value with 60% probability. the stock follows a random walk. in two days, what is the probability that the twa stock is greater than $30?
a. 64%
b. 16%
c. 35%
d. 36%
e. 24%