Suppose host A sends 5 TCP segments back to back to host B over a TCP connection. The first segment has sequence number 20, the second segment has sequence number 50, the third has sequence number 62, the fourth segment has sequence number 90, and the fifth segment has sequence number 100.

Suppose that the third segmentr is lost, but the second, the first, the fifth and the fourth segments arrive at B in this order (second before first, and fifth before fourth). In acknowledgements for the arrived segments that host B sends to host A, what will be the acknowledgements numbers?