The function f(x) = log₂​x is transformed 4 units down and vertically compressed by a factor of 0.2 to become g(x). Which function represents the transformation g(x)?
a. g(x) = −4log₂​(x + 1/5​)
b. g(x) = 1/5​log₂​(x) − 4
c. g(x) = 1/5​log₂(x − 4)
d. g(x) = −4log₂​(1/5​x)​