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Find the maximum prot and the number of units that must be produced and sold in order to yield the maximum prot. Assume that revenue, R(x). and cost, C(x), are in thousands of dollars, and x is in thousands of units. R(x)=6x-2x2. C(x)=x3 .53 \"x\" _-E>r The production level for the maximum prot is about El units. (Do not round until the nal answer. Then round to the whole number as needed.) The prot is about $D. (Do not round until the nal answer. Then round to the whole number as needed.)