A defense contractor is starting production on a new missile control system. On the basis of data collected during the assembly of the first 4 control systems, the production manager obtained the function L'(x) = 4,500x " describing the rate of labor use. For example, after assembly of 4 units, the rate of assembly is 2250 labor-hours per unit, and after assembly of 16 units, the rate of assembly is 1125 labor-hours per unit. The more units assembled, the more efficient the process. If 18,000 labor-hours are required to assemble the first 4 units, how many labor-hours L(x) will be required to assemble the first x units? The first 16? In order to find L(x), The number of labor-hours that will be required to assemble the first x units is L(x) =. (Use integers or fractions for any numbers in the expression.) The number of labor-hours that will be required to assemble the first 16 units is |labor-hours. (Type a whole number.)