3. (a) Draw a graph with 6 vertices, each of degree 1 .
(b) Draw two graphs with 6 vertices, each of degree 2 such that:
- the graph is connected,
- the graph is not connected.
A simple connected graph has 5 vertices each of degree \(x\).
(c) Find the possible values of \(x\) and explain your answer.
(d) For each value of \(x\) you found in part (c) draw a possible graph.