A company has a dedicated link of 100 Mbps. Each employee, when online, transmits continuously at 12 Mbps when active, but each user is active only 20 percent of the time. Assume packet switching is used.

(a) What is the probability that more than 2 users are transmitting at the same time?

(b) Suppose that the system will drop any packets if it's utilized at 100% capacity without queuing them. If we need to guarantee a probability of at most 0.05 of messages being lost, what is the maximum number of users we can support?