Consider sending a large file of f bits from host a to host b. there are three links (and two switches) between a and b, and the links are uncongested (that is, no queuing delays). host a segments the file into segments of bits each and adds 80 bits of header to each segment, forming packets of = 80 + bits. each link has a transmission rate of bps. find the value of that minimizes the delay of moving the file from host a to host b. disregard propagation delay.