<prompt> According to Schilder mechanical objectives of cleaning and shaping are:Canal should be continuously taper.Canal should be prepared in multiple plane.Apical construction should be as small as possible.All of the above.  <response>: Mechanical objectives by SCHILDERi Canal should be continuously taper Funnel orifice Apex.ii Canal should be prepared in multiple plane.iii Apical constriction should be as small as possible. 