Instructions: Write complete solutions to the following problems in the space provided. Besure to supply all the necessary steps that lead to your answers 1. Level curves for barometric pressure (in Millibars) are shown for 6:00 AM on November 10, 1998. A deep low with pressure 972 mb is moving over northeast Iowa. The distance along the red line from K (Kearney, Nebraska) to S (Sioux City, Iowa) is 300 km. Estimate the value of the directional derivative of the pressure function at Kearney in the direction of Sioux City. Use direction vector u = (cos 45", sin 45").