3. A system sends segments that carry 1,000 bits of data. How long does it take to send 1 million bits of data when the length of the link is 5,000 Km and the propagation speed on the link is 2 x 108 m/s. The link uses Stop and Wait ARQ. Repeat problem 3 above if the link is using Go-Back-N ARQ with a window size of 7. Ignore the overhead of the segment header and trailer. 4. 5. Repeat problem 3 above if the link is using Selective-Repeat ARQ with a window size of 4. Ignore the overhead of the segment header and trailer