Question 19 (0.5 points) A 2k experiment was designed to help a manufacturer improve the surface finish of parts produced on a milling machine. The factors and the levels considered were: Factor Low Level High Level Spindle Speed 10000 rpm 18,000 rpm Feed Rate 0.2 mm/rev 0.6 mm/rev In coded units, the direction of steepest ascent was found to be: 0.800/1 (Spindle Speed/Feed Rate) In order to follow the direction of steepest ascent, if a one unit step of 0.2 mm/rev is taken in the Feed Rate direction, what will be the change in Spindle Speed rpm (expressed in rpm, rounded to the nearest whole number)? Your