Former GM boss thinks Apple's car ambitions should shift into park

In case you haven't heard, Apple may or may not toiling away on a smart electric car - but at least one industry executive thinks it could wind up being a fool's errand, and is offering some free advice on the subject.Bloomberg today added fuel to ongoing rumors that Apple may be secretly working on its own electric automobile, with a retired industry veteran weighing in on some of the challenges the iPhone maker could face.Former General Motors Chief Executive Officer Dan Akerson cited the &quo