Computer networking : 3 questions please write steps/break down

Q1) for which there is an institutional network connected to the internet. Suppose that the average object size is 750000 bits and that the average request rate from the institutions browser to the origin servers is 20 requests per second. What's the traffic intensity (bits/s of traffic)/link bandwidth 15000 Institutional Networks LAN. Put the percent in decimal form.

Q2) for which there is an institutional network connected to the internet. Suppose that the average object size is 750000 bits and that the average request rate from the institutions browser to the origin servers is 20 requests per second. What's the traffic intensity (bits/s of traffic)/link bandwidth of the access link. Put the percent in decimal form.

Q3)for which there is an institutional network connected to the internet. Suppose that the average object size is 750000 bits and that the average request rate from the institutions browser to the origin servers is 20 requests per second. What's the traffic intensity (bits/s of traffic)/link bandwidth of the access link GIVEN THAT THERE'S A 60% CACHE RATE HIT at the Institution. Put the percent in decimal form.