The first thing that you're going to be asked to do as a rock solid bassist is to hold it down by pumping out the eighth notes. This is not as easy as it may seem as first, taking a real attention to detail and precision. The eighth notes need to be perfectly placed and played with an aggressive attitude AND control to move the groove forward. Pay close attention to the pushes on bars 3 and 4, and how you land on the downbeat when you go back to the root at the start of the phrase. The pentatonic slides in bars 1 and 5 are classic Paul McCartney lines that will serve you well.