Consider the circuit-switched

Consider the circuit-switched network in Figure 1.8. Recall that there are n cricuits on each link.
a. what is the maximum number of simultaneous connections that can be in progress at any one time in this network?
b. Suppose that all connections are between the switch in the upper-left-hand corner and the switch in the lower-right- hand corner. what is the maximum number of simultaneous connections that can be in progress?