Found sth in Mission350

[ERICMIAO0817]

Following the guide on Mission350Solutions.ipynb (I really appreciate this rookie-friendly notebook),I have found something about duplicated apps.🤒

Firstly,it's not proper to judge duplicated apps just by thier names.For example,there are two apps from different types(game and family) both named Solitaire,but you will loss this information if you only judge duplication by apps' name.
Secondly,for certain app named Cardiac diagnosis (heart rate, arrhythmia),it has both free version and paid version,if you do the same thing like you did on Solitaire,you will miss the free data or the paid data which will influence your analysis on all free apps.

Not sure if I make myself clear,once again,I reallyyyyy appreciate your brilliant work!!!