Help me in getting Corporate Restructing grasp

It is difficult to teach the general approach to P4 just by writing on here.
It can be a problem (specifically with the compulsory question) in knowing where to start.
Fortunately, the current examiner will split the question into sections which does help.

The important things:
Do something for each section of the question – they are very generous in their marking, and so even if you can only do a tiny bit for a section it is likely to get you 1 or 2 marks (which may not sound much, but is enormous if you would otherwise have failed on 49).

Don’t waste time in the calculation sections checking your figures and trying to get a ‘perfect’ answer. The final answer is not what gets the marks, but the approach. If it is clear to the marker what you are trying to do, then you will get most of the marks whether or not any of your figures end up being correct!

If you know what you should be doing, but cannot find (or understand) the information in the question (for example, if you know you need the asset beta but cannot sort out the information) then write that down – even if you cannot actually do any numbers at all. You will still get some credit for showing some understanding.

Spend the 15 minute reading time making quick notes on the exam papers of points you would make for the written parts of questions. So many people never write anything for the written parts (because they spend too much time on the calculations) and for that reason the written parts are often marked more lightly. If you have written one or two points on the exam paper for each of the written sections, then it takes no time at all to write them down properly when the exam starts, and again it will be a few extra marks all over the place.