Draw the sketches to indicate the conventional representation of the following: (a) A coarse ISO metric V-threaded rod of nominal diameter 10mm and thread length 25mm.(Take H=0.866p) (b) A threaded rod having ISO metric threads of nominal diameter 10mm and pitch 1.5mm. (c) A threaded rod of nominal diameter 20mm, pitch 2.5, with double start thread of ISO metric V form. (d) A rod of nominal diameter 12 mm of left-hand threads of pitch 1.75 mm and ISO metric triangular threads.