But there is no 2 & 4 option to the multiple choice

Need valid explaination (neat and clean handwritten solution).. I will upvote if you fulfilled all criterion stated above. THANKS. Don't give copied answer.

Task 8 - Induction Systems In order for combustion to take place an induction system is required to feed fuel and air into the cylinder of an engine. To improve efficiency and performance spark ignition (SI) engines are now adopting compression ignition (CI) engine technology by injecting fuel directly into the cylinder just before the point of ignition however these engines still require an air induction system. Carburettors: before fuel injection technology had been fully developed carburettors (carbs) were used to create a fuel/air ratio at different engine speeds and loads. A cold start facility was also fitted albeit manually operated. The demand for more performance has meant the fixed choke carb' was no longer suitable. More complex carbs' were developed (twin choke) as well as variable choke (constant depression) carbs which used engine vacuum (during throttle opening) to vary the size of choke according to operating requirements.

The data previously that i get is :- a) DOF = 1 b) Length, Z = 181.94 mm c) Transmission angle = 72 degree d) ? Can answer for part D? I need the answer for part D only.