Port Blair, the capital city of Andaman and Nicobar Islands is directly connected to Chennai and Vishakapatnam via ship route. The ships sail from Chennai/Vishakapatnam to Port Blair and vice versa.
Swaraj Dweep and Shaheed Dweep are two popular tourist islands in Andaman Islands. One has to take a ferry from Port Blair to reach these islands. There are ferries that sail frequently between the three islands - Port Blair (PB), Swaraj Dweep (SwD) and Shaheed Dweep (ShD).
Shown below is a schematic representation of the ship routes and ferry routes.
X is the set of all 5 places and Y is the set of 3 places in Andaman Islands. That is, X = {C, V, PB, SwD, ShD} and Y = {PB, SwD, ShD}. A relation R defined on the set X is given by, R = {(𝑥1, 𝑥2 ): there is a direct ship or direct ferry from 𝑥1 to 𝑥2}. A function 𝑓: Y → X is defined by, 𝑓(𝑃𝐵) = 𝑉, 𝑓(𝑆𝑤𝐷) = 𝑃𝐵, 𝑓(𝑆ℎ𝐷) = 𝑆𝑤𝐷.
(i) List all the elements of R.