(1 point) Surface Temperature (F) 23Z Sat Oct 24 2009 30 11C 106 50 35 30 35 10 55 60 65 Des Moines 75 75 80 80 WW2010 (http:Www2010.atmos.uiuc.edu) Atmospheric Sciences, University of Illinois at Urbane-Champaign (a) Describe a possible graph of the temperature, T, on an east-west line through Durango, Colorado, if the origin is at Durango, the positive x-axis corresponds to east of Durango, and the vertical z-axis is the temperature. For negative x within a few hundred miles of the origin, the sign of T'(x) is ? , while for positive x a few hundred miles from the origin, the sign of T' (x) is ? . We estimate that T(0) = ? 4 degrees Fahrenheit. (b) Describe a possible graph of the temperature, T, on a north-south line through Des Moines, lowa, if the origin is at Des Moines, the positive y- axis corresponds to north of Des Moines, and the vertical z-axis is the temperature. For negative y within a few hundred miles of the origin, the sign of T'(y) is ? , while for positive y a few hundred miles from the origin, the sign of T'(y) is ? . We estimate that T(0) = ? degrees Fahrenheit