 If we are asked to use Go-Back-N protocol at the Data Link Layer, please calculate the link 
efficiency of this protocol in terms of Link Utilization we saw in class under the following 
conditions. If N is set to 1, and frame size is 5000 bits, and propagation delay 500ms, and 
with a bandwidth of 5000bps. You can assume that time to transmit an acknowledgement is 
0 seconds.

formula:U = Tf / (Tf + 2Tp) = (L/B ) / (L/B + 2Tp) = L/ (L+ 2Tp B)  I want the entire output in JSON format.
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