What range of bytes should be now be sent from host b to host a without any additional acknowledgment being sent from host a to host b?
a. 9079 - 9089
b. 9080 - 9090
c. 9080 - 9091
d. 9080 - 9089

answeroperating system;

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.