The trajectory of an object is defined as x = (t-4)^2, what is the velocity at t = 5?

The trajectory of an object is defined as x = (t-4)^2, what is the velocity at t = 5?
 
(a) 2
 
(b) 5
 
(c) 1
 
(d) 4
 
I have been asked this question during an online interview.
 
I need to ask this question from Straight Line Motion topic in portion Motion in a Straight Line of Physics – Class 11
Select the correct answer from above options 
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