This Masteries are mostly related with accessing accounts on different platforms (GitHub, Twitter and a Blog) and using them to upload assignments for the class. 

So first, in order to create an account you must access the webpages. For instance to create a Twitter account you must enter its webpage, fill the registration requirements and interact with the platform. The blog is similar in process and there are several options to create a blog ( you might use WithKnown, WordPress, among others), also its more interactive since you can edit the way its apperance and determine certain characteristics. GitHub is also similar, fulfilling the information and start personalizing your information with images and posts. Here are my accounts:

-Twitter: @Betospike77

-GitHub: CarlosGallegosT

-Blog: https://interestingstuff.withknown.com/

Mastery 4 consists of proving the ability to submit work by using the Blog and GitHub. The blog has the option of creating posts which can be complemented by ading pictures, quotations, links and changing the format of the letter, this features are used to fulfill the assignments and give a personal touch to the post, also its necessary to add the hashtags meant for the task, in this case #Mastery3, #Mastery4 and the course #TC1017 and finally post the content. GitHub is different since its a platform used to upload codes and allows several people to work on the same post by creating branches, in order to upload a code first you must create a repository, later click on the + button and type or paste the code you have created:

Hope this  works, thanks for watching.