While developing their newest game, Sasquatch Attack!, the makers of the PortaBoy (from Example 2.1.5) revised their cost function and now use C(x)=.03x3−4.5x2+225x+250, for x≥0. As before, C(x) is the cost to make x PortaBoy Game Systems. Market research indicates that the demand function p(x)=−1.5x+250 remains unchanged. Use a graphing utility to find the production level x that maximizes the profit made by producing and selling x PortaBoy game systems.