The rate of growth G, in thousands of dollars per year, in sales of a certain product is a function of the current sales level s, in thousands of dollars, and the model uses a quadratic function shown below. (Note: 's' is in thousands of dollars, while "sales level is in dollars.) G 1.2s 0.3s2 The model is valid up to a sales level of 4 thousand dollars (a) Draw a graph of G versus s 008 04 0.2 (b) Express using functional notation the rate of growth in sales at a sales level of $1750. (Round your answers to three decimal places.) Gr Estimate the va ue returned from the function G. (Round your answers to three decimal places.) (c) At what sales level is the rate of growth in sales maximized