for the first question:
the answer is C- 2
because the pc will send the packet to the router , the router will open it and read the dst. IP , then packetize it and send it to the next router that is hop "1" , the next router will also open it to read the dst IP , then send it to the server , that is hop "2".
for question 2:
the answer is B-60 sec
because the router take 180 sec for hold down and take 240 sec to be removed from the routing table .
here he say "After a rip route is marked invalid on router" this means that 180 sec have finished ,and the router is removed from the routing table after 240 sec, then it will be removed after 240 -180 , which means that it will be removed after 60 Sec .
i hope u understanded me