It has been a while since I took Econ, but here goes:

For the first one, it is only natural that inflation will rise at full employment. As I am sure you know the price level = demand / supply where in this example demand is the money supply and supply are all available goods. With the price/wage spiral, prices increase to keep real dollar profits from dropping while wages increase to maintain purchasing power. Inflation is the cause of too much money (demand) with not enough supply. So, if inflation is increasing at a steady rate, your real dollar purchasing power has remained the same. So, if everyone is employed, while wages may increase, their purchasing power remains the same.