Question: Take the last letters of the words in "Elon Musk" and concatenate them.
Given Information: The given information is the words whose last letters need to be concatenated: "Elon", "Musk"
Objective: The question is asking for the last letters of the given words.
Answer: Let's think step by step.
The last letter of "Elon" is "n". 
The last letter of "Musk" is "k".
Concatenating them is "nk".
So the answer is nk.

Question: Take the last letters of the words in "Larry Page" and concatenate them.
Given Information: The given information is the words whose last letters need to be concatenated: "Larry", "Page"
Objective: The question is asking for the last letters of the given words.
Answer: Let's think step by step.
The last letter of "Larry" is "y". 
The last letter of "Page" is "e".
Concatenating them is "ye".
So the answer is ye.

Question: Take the last letters of the words in "Sergey Brin" and concatenate them.
Given Information: The given information is the words whose last letters need to be concatenated: "Sergey", "Brin"
Objective: The question is asking for the last letters of the given words.
Answer: Let's think step by step.
The last letter of "Sergey" is "y". 
The last letter of "Brin" is "n".
Concatenating them is "yn".
So the answer is yn.

Question: Take the last letters of the words in "Bill Gates" and concatenate them.
Given Information: The given information is the words whose last letters need to be concatenated: "Bill", "Gates"
Objective: The question is asking for the last letters of the given words.
Answer: Let's think step by step.
The last letter of "Bill" is "l".
The last letter of "Gates" is "s". 
Concatenating them is "ls". 
So the answer is ls.