Let i j k is the mean assembly time for the i t h machine, j t h configuration and k t h power setting ( k = 1 if low, k = 2 if medium and k = 3 if high). If Machine 1 was manufactured in USA, and Machines 2 & 3 were manufactured internationally, and the engineers think that the assembly time on high power setting in USA manufactured machines are different to assembly time on high power setting in internationally manufactured machines. Write down the appropriate contrast to test this hypothesis