U(s)(s)=G(s)=1+Tl,esKl,eeTt,es where (s) is the air-fuel ratio, U(s) is the control variable (e.g. fuel injection time). Assume that K1,e=1.25;Tl,e=0.05sec; and Td,c=0.02sec. Design a Proportional plus Integral (P) controller (i.e. determine the P+I gain values) to obtain the following step response characteristics: Rise time (90%)=0.5sec; Max overshoot