The bottom of ignacio's desktop is 74.5\,\text{cm}74.5cm74, point, 5, start text, c, m, end text from the floor. ignacio sits in his adjustable chair, and the tops of his legs are 49.3\,\text{cm}49.3cm49, point, 3, start text, c, m, end text from the floor. each clockwise rotation of the knob on the chair raises ignacio's legs by 4.8\,\text{cm}4.8cm4, point, 8, start text, c, m, end text.