An automobile has a three-liter V6 SI engine. At slow engine speeds, it is desired to have a low cylinder swirl to reduce flame speed during combustion. At fast engine speeds, the high swirl is desired. To accomplish this, the cylinders will each have two (or three) intake valves, using only one at low speeds and all valves at high speeds. Design the intake manifold, valve system, combustion chambers, and camshaft(s) for this engine. Describe the operation at low and high speeds.