I need solve this questions

QUESTION 18 5 points v Saved A driver encounters two traffic lights on the way to work each morning. Each light is either red, yellow, or green. The probability of various combinations of colors is given in the following table: Second Light First Light R G R 0.30 0.04 0.16 0.05 0.11 0.04 0.05 0.05 0.20 Consider the following events: A: first light is red B: second light is green a) What is the probability that the second light is green? b) If the first light is red, what is the probability that the second light is green? c) Are A and B independent events? Justify your answer. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). B I Y S Paragraph Arial 14px E EA L I X O A Q 60 F:7: ... A) P(B)= 0.16+0.04+0.20 = 0.40 B) P(B/A) = 0.16/(0.16+0.004+0.30)= 0.32 C) P(B/A) dose not equal P(B) so its not independent. QUESTION 19 5 points v Saved Benny's Barber Shop in Cleveland has five chairs for waiting customers. Previous records indicate that the probably distribution for the number of customers waiting, Y, is as follows. 0 2 3 4 5 P(Y=y) 0.419 0.160 0.137 0.110 0.096 0.078 0.096 What is the probability that exactly four customers are waiting? 0.078 What is the probability that more than four customers are waiting? 0.922 What is the probability that at most four customers are waiting? 0.174 What is the probability that at least four customers are waiting? 0.407 Find P(1 sY