I wrote down a UDP based ping program, which can send ping request packets of variable size. I made some measurements using this tool by pinging the first hop router from my computer: the router has a ping time of 90 usec for packets of 500 Bytes long and 250 sec for packets of 1500 Bytes long (1 sec = 10 sec). Assume that the router simply echoes back the ping request message and transmission rates at both directions are same. What is the propagation delay and transmission rate of the link connecting my computer to the router