1. Consider the graph of M(x,y] : ln(2x + 3y) where x : r2 and y : 2: for t> 0 Let I equal time in seconds and M be mass in grams. a. The graph of the function described above is actually the red surface curve. What are the parametric equations for the \"red\" surface curve? b. Use the chain rule to determine how fast the function M's output is changing at time I = 1 second. (Give correct units to your answer.) c. Find the equation for the tangent line at [:1 second