A 2.5-liter, four-stroke cycle SI engine using multipoint port fuel injection has an idling speed of 300 RPM (and) and a maximum WOT speed of 4800 RPM (and). Injectors have a constant mass flow rate...

A 2.5-liter, four-stroke cycle SI engine using multipoint port fuel injection has an idling speed of 300 RPM (and) and a maximum WOT speed of 4800 RPM (and). Injectors have a constant mass flow rate at all conditions. Design an injection system for this engine, giving the number of injectors per cylinder and the flow rate through each injector in kg/sec. What is the duration of injection for one cycle, and when should injection start relative to the intake valve opening? Give your answers in seconds, in degrees of engine rotation at idle, and at WOT. State all assumptions you make.