INTRODUCTION
I joined the family of Steemit few days ago through the effort of @pricelesspresh. She was very instructive while putting me through. Although I have had some writing experiences before now, here seems to be a bit different but with her tireless guide and instructions, I was able to grab some basic points (I am still finding the platform a bit strange but I am positive that I will adapt and be used to it in no distant time. After being verified in my Achievement Task 1 by @ngoenyi, I feel motivated to do this Achievement Task 2 which I consider very basic and essential. This task to me is the most crucial because all activities here are tied to it. Why did I say so? One may have tirelessly worked for one earnings and at the end lose everything if the individual is not careful with all the security keys.
So, I feel this is a task for every newbie like me should go through.

Question 1 : Retrieval of Steemit Keys
I have been able to retrieve all necessary keys because without them, my membership here will be a total waste of time.

Question 2: Key Functions and restrictions
With the tutorial given by @crptokannon, I have been able to master all the basic keys and their uses. For instance:
i POSTING KEY allows every Steemit user to perform different tasks such as posting, making of comments on posts, editing a content, follow another Steemit user etc. This key is very important as almost all daily activities on one's profile and actions are tied to it.

ii ACTIVE KEY is used when carrying carrying out crucial tasks such as transfer of fund from one Steemit user to another, power up/down transactions, conversion of Steem Dollars, Voting for Witnesses and even updating of one's profile details and the likes.

iii OWNER KEY is used on special occasions when the need calls for it. For instance, it is used for the recovery of an account that has been altered or hacked.
iv MEMO KEY is used primarily for the description and encryption of memos when funds are to be transferred from one person to another.

Question 3: Measure to employ in keeping one's master password
As stated during the tutorial,since the master password can't be recovered when misplaced, I saved it on my offline diary where no one can access it nor can it be misplaced.

Question 4: How to transfer Steem token to another Steem account.
After going through the content on that aspect, I can be able to transfer Steem Fund from my account to another if the need be with the use of ACTIVE KEY.

Question 5: How to power up Steem
To power up Steem, all I need do is go to Wallet. After clicking on it, the button for balances will show. I will scroll down to the place of STEEM. Right there, my available Steem will show and I will click on the option arrow and then click on Power Up

Once again, thank you @cryptokannon for the guide and the privilege given to me to partake in this crucial Achievement 2 task.