Router R has the table shown below listing five destinations A-E, and three neighbor routers S, T, U. It updates its table using the usual distance-vector algorithm, where dist is the distance in hops.

Original table:

net	dist	nexthop
A	5	S
B	4	U
C	6	T
D	7	T
E	8	S

Suppose R receives the table below as its next distance-vector report from neighbor S.

net	dist
A	8
B	4
C	4
D	6
E	6
F	4

Give Rs updated table and a brief explanation of each change