I need help in number 19. The top one is the question and the bottom 19 is the answer in case u need it. I have no idea how to do it and as well if whoever is doing this can explain how to find the 1.04 Z score

19. Flight times An airline flies the same route at the same time each day. The flight time can be modeled by a normal distribution having unknown mean and standard deviation. On 15% of days, the flight takes more than an hour. On 3% of days, the flight lasts 75 minutes or more. Use this information to determine the mean and standard deviation of the flight time distribution. 20. Brush your teeth The amount of time Riccardo spends brushing his teeth can be modeled by a normal distribution with unknown mean and standard deviation Riccardo enends less than 1 minute brushing his teeth about 10 of 145 V es/Statistics and x Z-score Calculator X + macmillan.vitalsource.com/reader/books/9781319251833/epubcfi/6/218[sta_978... G ol Ioml Volleyball Shopify H.U. 2.0 SAT M Inbox (1,329) - dom.. a Amazon.com. Spen.. 17. Q1:2 = -0.67 gives an area to the left of about 0.25. Q3: z =0.67 gives an area to the left of about 0.75. 19. We are looking for the value of z with an area of 0.15 to the right and 0.85 to the left, and the value of z with an area of 0.03 to the right and 0.97 to the left. We get the values z = 1.04 and z = 1.88. Now we need to solve the following system of equations for u and o: 1.04 = 60 - 1 and