Slotted Aloha. Suppose we have N users who share the same medium using slotted ALOHA scheme. However, the users are not perfectly synchronized. Half of the users have their slots shifted by 1/2. That is, suppose half of the users have slots starting at time 0,1,2,···, the other half of the users start their slots at time 1/2, 3/2, · · · . Assume that each user has a probability p to transmit at each slot. What is the maximum throughput?