(a) Total employee working in CNC at the end of 2014=220–28+32=224 Let total employee who left CNC in 2016 & 2017 together be 6x & 7x respectively ATQ – 224+96–18+72–6x+144–7x=466 13x=518–466 13x = 52 So, total 52 employees left CNC in 2016 & 2017 together.