In a grinding operation, there is an upper specification of 3.150in. on a dimension of certain part after grinding. suppose that the standard deviation of this normally distributed dimension for parts of this type ground to any particular mean dimension μ is σ=0.002 in. suppose further that you desire to have no more than 3% of the parts fail to meet specifications. what is the maximum (minimum maching cost) μ that can be used if this 3% requirement is to be meet?