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A host starts a TCP transmission with an Estimated RTT of 21.6ms (from the "handshake"). The...

A host starts a TCP transmission with an Estimated RTT of 21.6ms (from the "handshake"). The host then sends 3 packets and records the RTT for each:
SampleRTT1 = 11.6 ms
SampleRTT2 = 10.6 ms
SampleRTT3 = 34.1 ms
(NOTE: SampleRTT1 is the "oldest"; SampleRTT3 is the most recent.)
Using an exponential weighted moving average with a weight of 0.4 given to the most recent sample, what is the EstimatedRTT for packet #4? Give answer in milliseconds, rounded to one decimal place.
I know the answer is 22.5 but can you show me how?

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