Circuit boards (such as those used in PCs) are drilled with holes for mounting different electronic components. The boards are fed one at a time under a moving drill. The matrix below provides the distances (in millimetres) between pairs of 6 holes of a specific circuit board. Suppose that the drill moves at a linear speed of 9 millimetres per second and that it takes 0.7 seconds to drill the hole. Determine an upper bound on the production rate (boards per hour). i) ii) iii) ||di|| 1.3 .5 2.6 4.1 3.2 1.3 .5 2.6 4.1 3.5 4.7 3.5 3.2 3.0 5.3 4.6 6.2 3.8 .9 1.9 3.5 4.7 3.5 3.0 4.6 3.8 5.3 6.2 .9 1.9 solve as an assignment problem (show all steps and explain). Solve as a TSP using the Branch and bound method (show all steps and explain). Provide a detailed AMPL solution (show all steps).