2.5. Sketch the tree that represents the PF code s100,s2010,s3100,s4111, and label each leaf with the corresponding symbol. Is it possible to extend this code without destroying the PF property? 2.6. Denote the ternary alphabet by T={0,1,2}. Construct a tree representing the ternary code with codewords 02,101,120,221,222. Is it possible to extend this code without destroying the PF property