A person wants to take a study sample consisting of 30 schools from the schools located in all the governorates of Riyadh, knowing that the number of schools in Riyadh is 300 and the number of schools in each governorate is as follows:

Shaqra Governorate 180 schools

Huraymila Governorate 50 schools

Northern Governorate 40 schools

Southern Governorate 30 schools

What is required is to apply the steps of selecting a research sample with an explanation of each of these steps in detail. The answer must include the appropriate type of sample and its distribution to the study population in the correct and accurate manner

I need an explanation without references