4. Consider the below information relating to wage computation of few workers who work in Seattle Machining: Standard output per hour Time Rate Ordinary Piece Rate Low Piece Rate Actual Production (in an 8 hours day): High Piece Rate Mr. A Mr. B. :5 units : $4 per hour :$0.8 : $0.65 : $0.96 :30 units : 40 units :50 units Mr. C Required: Based on above data, calculate the earnings of A, B and C under each of the following methods: a) Taylor's Differential Piece Rate Plan (I mark) b) Merrick's Multiple Piece Rate Plan (I mark) c) Gantt's Task and Bonus Plan (I mark)