an observed transfer function from voltage potential to force in skeletal muscles is given by H$($s$)=450/($s$+5)($s$+20)$ a$)$ obtain the system's impulse transfer response h$($t$).$ b$)$ integrate the impulse response h$($t$)$ to find the step response g$($t$).$ c$)$ verify the result in part b by obtaining the step response using laplace transforms