What is the difference between an expert source and an unbiased source? Is it possible for sources to be experts if they are also biased? Why? Illustrate with an example

What will be an ideal response?

Explanations and examples will vary. Important concepts include definition of expert (a person qualified to speak on a particular topic) and bias (individuals with a vestedinterest in a product, a service, or an issue, who may be less objective.)