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

Let S = $45, r = 3% (continuously compounded), d = 5%, s = 30%, T = 1.5. In this situation, the appropriate values of u and d are 1.27738 and 0.75972, respectively. Using a 2-step binomial tree, calculate the value of a $40-strike European call option.

Selected Answer:	b. $8.305
Answers:	a. $7.037
	b. $8.305
	c. $7.783
	d. $8.141
	e. $7.960