1. {10 points) In 2009, a study was done on the impact of sea-level rise in the mid-Atlantic states. Let a(t) be the depth of the sea in millimeters (mm) at a typical point on the Atlantic Coast, with time t in years since data collection started? The study reports "Sea level is rising and there is evidence that the rate is slowing down.\" What does this statement tell us about the sign of a'{t} and a\"(t)? Give reasoning