Please explain in detail I have tried and can not get the right answer thank you for your help!

Let S = $55, K = $50, r = 6% (continuously compounded), d = 2%, s = 40%, T = 0.5, and n = 5. In this situation, the appropriate values of u and d are 1.13939 and 0.88471, respectively. What is the value of p*, the risk-neutral probability of an upward movement in the stock price at any node of the binomial tree?

Selected Answer:	e. 0.3738
Answers:	a. 0.4998
	b. 0.5316
	c. 0.4146
	d. 0.4684
	e. 0.3738