A rib fabric from ring spun cotton yarn of Ne 25/1 will be produced on a circular knitting machine whose technical details are given by E20, 30mo diameter and 35 rey /min. The tightness factor (TF=(TEX)/ (stitch length)) of the structure is 15 and the input tension of the xarm is 0.1g/tex a)Calculate the optimum yarm teasion in terms of grams, (10 p) b) Calculate yaxn speed in terms of meters/min, providing that positixe yarm feeders. are used on that particular machine. (15 p)