A:
With only the WMU and the P520, you cannot do this.
However.
It might be possible, if your smart device allows you to view what you are seeing on the smart device on the TV. For example, with Apple TV, you can view what you are looking at, on your iPhone or iPad or computer, on your TV. This requires the additional purchase of another set-top box that communicates with your smart device. This should work - but has not been officially tested.