If you can add the rest of the question, I will edit this answer to actually be helpful.
5=27
N=5
Explanation=there’s a difference between each number of 5
Eg:12-7=5
17-12=5
22-17=5
So that means 22+5=27 and n=5 since it is the number difference
(I hope this helps you out)
The answers is A. 60 degrees
R=7s/3+k/3
Hope this helps!