For the following three questions, consider the following:

Suppose a TCP segment that contains $2380$ bytes of TCP data and $20$ bytes of TCP header is prossed from the transport layer to IPv$4$ for delivery across three networks of the lntemet $($i$.$e$.$ from the source host through router$1,$ then router$2,$ and then to a destination host$).$ The first network uses frames with an MTU of $4000$ bytes; the second network uses frames with an MTU of $990$ bytes; and the third network uses frames with an MTU of $1500$ bytes. Note that the MTU is the size of the data portion of the layer$-2$ frame. Refer to the last page for header formats, if needed. Assume in the following that IP datagrams are neither lost nor re$-$ordered.

$17.$ How many fragments will arrive at the destination?

a$)1$

b$)2$

c$)3$

d$)4$

e$)$ none of the above

$18.$ What is the Length field $($in decimal$)$ of the last IP datagram fragment received at the destination?

a$)484$

b$)448$

c$)500$

d$)452$

e$)$ none of the above

$19.$ What is the Fragment Offiset field $($in decimal$)$ of the last IP fragment received at the destination?

a$)242$

b$)122$

c$)246$

d$)124$

c$)$ none of the above