A host starts a TCP transmission with an EstimatedRTT of 13.6ms (from the handshake). The host then sends 3 packets and records the RTT for each:

SampleRTT1 = 46.3 ms

SampleRTT2 = 18.8 ms

SampleRTT3 = 19.7 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 miliseconds, rounded to one decimal place, without units, so for an answer of 0.01146 seconds, you would enter "11.5" without the quotes.

Anwser is 22 can you guys help me understand?