According to the traffic regulations, the ‘steep ascent’ sign gives advance warning of a stretch of road with a steepness that may constitute a hazard. The steepness is expressed as a percentage.[br][br]If a straight road is built such that, over a length of 1.2 km, it rises by 85 m, what is its inclination (in degrees)?[br][br]What percentage would be shown on the road sign?