Consider the diagram. Host A and B are communicating over a TCP connection, and Host B has already received from A all bytes up through byte $319.$ Suppose Host A then sends two segments to Host $B$ backto$-$back. The timeout is $100ms.$

If the second segment arives before the first segment at time $=60ms,$ what is the value of $w$

a$.70$

b$.319$

c$.390$

d$.320$

e$.450$

f$.$ none

g$.60$