(A) What is the damping ratio of this system? (B) Is this system underdamped, critically damped, or overdamped? (C) Define what "unit step response" means. (D) Find the unit step response of this system (analytically). (E) What is the DC gain?

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise