Are you confused by 'ability', 'capability' and 'capacity' because they could all mean 能力 in Chinese?

　　I have the ability to do the job.

　　I have the capability to deliver that project on time and on budget.

　　I have the capability to deliver that project on time and on budget.

　　In this programme, Feifei explains how do use the three similar nouns in everyday life.