Requirement: Give us an example of a skill that you have acquired through self-learning, and explain the process in which you taught yourself the skill? (250 words maximum)

Hi, I applied to master of business analytics and this is one of my admission essay. I hope you coudl write an eample of a self-learning based on my internship. I interned in a securities company, so I hope the experience is related to this aspect. Of course, if you have any other good idea about business analytics, you could tell me first. And I will make a decision for it. Thanks a lot.