Assume synchronous time division multiplexer with three inputs channel 1, channel 2, and channel 3. The output of this multiplexer produces synchronous 12-bit frames that are provisioned for stuffing as shown in the figure. The stuffing process can occur with each frame. The output link of this multiplexer operates at 36 Mbps. The input channel data rates have an upper bound, lower bound, and average data rates at channel 1?

S3 S2 S C C2 C1 3 2 1 3213 2 1 3 2 1 Input channels Output frames that runs synchronously at 36 Mbps 2 Cstuffing indicator for channel n Sn- data or stuff bits in channel n S3 S2 S C C2 C1 3 2 1 3213 2 1 3 2 1 Input channels Output frames that runs synchronously at 36 Mbps 2 Cstuffing indicator for channel n Sn- data or stuff bits in channel n