A router R has the following distance-vector table:

destination	cost	next hop
A	5	R1
B	6	R1
C	7	R2
D	8	R2
E	9	R3

R now receives the following report from R1; the cost of the RR1 link is 1.

destination	cost
A	4
B	7
C	7
D	6
E	8
F	8

Give Rs updated table after it processes R1s report. For each entry that changes, give a brief explanation