In a chemical milling operation on a flat mild steel plane, it is desired to cut an ellipse-shaped pocket to a depth of 0.4 in. The semiaxes of the ellipse are a=9.0 in and b= 6.0 in. A solution of hydrochloric and nitric acids will be used as the etchant. Determine metal removal rate, etching time, and required dimensions of the opening in the cut and peel maskant required to achieve the desired pocket size on the part.