41 Transmission delays in wireless technology . Resource Reservation Protocol (RSVP) was originally designed to establish signaling links for stationary networks. In Mobile Networks and Applications (Dec. 2003), RSVP was applied to mobile wireless technology (e.g., a PC notebook with wireless LAN card for Internet access). A simulation study revealed that the transmission delay (measured in milliseconds)

of an RSVP–linked wireless device has an approximate normal distribution with mean m = 48.5 milliseconds and s = 8.5 milliseconds.

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

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