Consider the following particulars for a spinning line producing 30 tex yarn from 150 militex polyester fibre.Mass CV of card sliver                           : 3%Mass CV added at draw-frame            : 2%Mass CV added at speed-frame          : 3%Mass CV added at ring-frame              : 7%Number of doubling at draw-frame   : 6Number of draw-frame passage         : 1The mass CV% of roving is approximately