The time spent (in days) waiting for a heart transplant for patients with typeA⁺blood can be approximated by a normal distribution withmean 127 daysandstandard deviation23.5 days.

Answer the following questions by computing z-scores and usingNORMAL PROBABILITY TABLES.

a)What is the probability of selecting a patient who waitedless than55 days?

b)Approximately what percentage of heart patients must waitover150 days for a transplant?

c)What is the probability of selecting a patient who waitedbetween55 and 150 days?

d)What proportion of patients waited less than 100 days or more than 150 days?

e)FindP_{25 .}

f)FindP_{99 .}