6. (10 pts) Given the network graph below, assuming all routers are MPLS capable. 0 R6 0 0 1 D R4 2 R3 R5 0 2 0 R2 R1 The MPLS forward tables below have configured these four routing paths: path 1: from R6 to A path 2: from R6 to D path 3: from R5 to A path 4: from R5 to D out interface 0 0 0 0 40 In the table below, N/A means not applicable. in label out label destination R6 MPLS NA 60 A forward table N/A 61 D RS MPLS N/A 50 A forward table NA 51 D R4 MPLS 60 A forward table 61 41 D 50 42 A 51 43 R3 MPLS 40 30 A forward table 41 N/A D 22 N/A D R2 MPLS 30 20 forward table 42 21 A 43 22 D R1 MPLS 20 NA forward table 21 NA A 0 0 1 1 2 1 1 2 2 1 0 0 Read the table above carefully, and please write down the intermediate routers in correct sequence for the four routing paths: path 1 to 4, as mentioned above. For example, your answer for path 1 should have a similar format like this: Path i's routing sequence is from R6, to R2, to R4, then to A This sample sequence in the line above is to show you the correct format of the answer, and it is actually not the correct answer for path l's routing sequence