(a) Find a 20 that has area 0.9484 to its left. (Round your answer to two decimal places.) z.=x (b) Find a zCI that has area 0.06 to its left. (Round your answer to two decimal places.) 20 = Z You may need to use the appropriate appendix table or technology to answer this question. Find the following percentiles for the standard normal random variable z. (Round your answers to two decimal places.) (a) 90th percentile Z = (b ) 95th percentile Z = ( c ) 96th percentile Z = (d) 99th percentile Z = You may need to use the appropriate appendix table or technology to answer this question.A normal random variable x has mean / = 1.7 and standard deviation o = 0.19. Find the probabilities of these X-values. (Round your answers to four decimal places.) (a) 1.00 1.35 (c) 1.45