Hi expert, this is question programming in c++ hope you can do the question in detailed and correctly so that i can understand and learn something from you expert.i really need explanation to get better understanding thank you expert, will vote ya

Soalan 1 Question 1 a) Bilakah pengulangan sentinel-terkawal diperlukan dan bagaimana ia dilaksanakan? Apakah perbezaan di antara pengendali prakenaikan dan poskenaikan? When is sentinel-controlled repetition necessary and how is it implemented? What is the difference between the preincrement and postincrement operators? (5 markah/ marks) b) Explain the difference between a while statement and a do...while statement. Draw a flowchart for each. Under what circumstances would the default case in a switch statement execute? What would happen under those circumstances if there is no default case? (5 markah/ marks) Provide an example and briefly discuss: (i) Local Variable (ii) Global Variable (iii) Static Local Variable (5 markah/ marks)