How do you do this question? Im working from home and this is the teachers worked example.. with no workings on it Step by step, i need to know what to do for each question ( 1 - 3 )

Answer:
1: 30/ 2:15 / 3:10 / 4: 7.5 / 10: 3
Step-by-step explanation:
divide each day by the number of builders