Draw figures representing our abstract view of the structures created by each of the following code sequences. assume that each case is preceded by these three lines of code: llnode < string > node1 = new llnode < string > ("alpha"); llnode < string > node2 = new llnode < string > ("beta"); llnode < string > node3 = new llnode < string > ("gamma"); a. node1.setlink(node3); node2.setlink(node3); b. node1.setlink(node2); node2.setlink(node3); node3.setlink(node1); c. node1.setlink(node3); node2.setlink(node1.;