4-18.In textbook fiqure 4-37, the compassspread O’P is equal to what distance?4-19.4-20.4-21.1.2.3.4.InOP1.2.3.4.ABThe radius OP minus ABThe radius of arc EF minus ABThe radius OP minus the radius ofarc CDtextbook figure 4-38, the radiusis equal to what distance?O’PThearcThearcTheandWhat isline AB less the radius ofCDline AB less the radius ofEFsum of the radii of arcs CDEFthe first step forconstructing a compound curve, asshown in figure 4-40 of the textbook?1.Draw the chords connecting AB,BC , CD, and DE2.Erect a perpendicular bisectorfrom A to B3.Establish the random distance O_{1}A4.Draw arc ABAssume that you just constructed theogee curve skown in figure 4-42 ofthe textbook.Which of the followingpoints was NOT established bygeometric construction?1. C2. D3. E4. O_{1}4-22.When using the pin-and-string methodto construct an ellipse, which of thefollowing points should you use todetermine the length of the stringbefore drawing the perimeter of theellipse?1.Both end points of the minor axisand one focus point2.Both end points of the major axisand one focus point3.Both foci points and one endpoint of the minor axis4.Both foci points and one endpoint of the major axisFigure 4AIN ANSWERING QUESTIONS 4-23 AND 4-24, REFERTO FIGURE 4A WHICH SHOWS THE CONSTRUCTIONLINES USED FOR DRAWING AN ELLIPSE BY THEFOUR-CENTER METHOD.4-23.Line DE is equivalent to which ofthe following lines or distances?1.Line DO2.Line KO3.Line AO minus line AK4.Line AO minus line DO4-24.Which of the following descriptionsdescribes point K correctly?1.The end point of line KO, whichis on the minor axis2.The intersection of line AO withthe perpendicular bisector ofline AE3.The intersection of line KO withthe perpendicular bisector ofline AD4.The end point of line KO, whichis equal to the difference inlengths of lines AO and DO24