Exercise $2$:

Or a synchronous static time multiplexer with $3$ input channels. Channel A debits at $1200$ bits$/$s$,$ channel B

at $1200$ bits$/$s and channel C at x bits$/$s$.$ The bit rate on the composite channel is y bits$/$s$.$

We assume that channel A sends sequences of $\text{'}$A$\text{'},$ channe

sequences of $\text{'}$C$\text{'}$ and we note that the sequences of characters which pass on the line are always in 'ABCC'

order. What are the values of x and y in bits$/$s$?($The multiplexer in this case does not add any additional

control elements$)."$