Consider the network fragment shown below. $\backslash$times has only two attached neighbours, w and y$.$

The complete paths from w and y to u are not shown.

$3$

$15$

Answer the following questions $($note$,$ each question is independent of other questions$)$:

A$.$ In the above figure, what is the distance vector of X to destination U$,$

Dx$($U$)=$

B$.$ In the above figure, if the link cost between X and Wiis now $6,$ calculate:

Dy$($U$)=$

C$.$ In the above figure, if the link cost between Y and W is now $2,$ calculate:

Dy$($U$)=$

D$.$ In the above figure, if the link cost between X and Y is now $9,$ calculate:

Dx$($U$)=$

E$.$ In the above figure, if the link cost between X and Y is now $3,$ calculate:

Dx$($U$)=$

note: enter integer numbers only