need answers to a and b

Resource Reservation Protocol(RSVP) was originally designed to establish signaling links for stationary networks. RSVP was applied to mobile wireless technology. A simulation study revealed that the transmission delay(measured inmilliseconds) of an RSVP linked wireless device has an approximate normal distribution with mean =50.5 milliseconds and =8.5 milliseconds. Complete parts a and b.

a. What is the probability that the transmission delay is less than 57milliseconds?

P(x<57)=

(Round to three decimal places asneeded.)

b. What is the probability that the transmission delay is between 40 and 60milliseconds?

P(40x60)

(Round to three decimal places asneeded.)