Set up the following characteristic equations in the form suited to evans root-locus method. give l(s), a(s) and b(s) and the parameter k in terms of the original parameters in each case. be sure to select k so that a(s) and b(s) are monic (i. e., the coefficient of the highest power is 1) in each case and the degree of b(s) is not greater than that of a(s).

A)-in the process of engineering design, explain the contribution of material selection. b)- explain the procedure of synthesis as is employed in engineering design. c)- is there any relationship between ergonomics and engineering design? explain. d)- safety consideration in engineering design includes human, product and the enviroment . explain how safety will be incorporated into the design?