Answer
(a) $(4,12)$
(b) $(8,16)$
Work Step by Step
(a) As $f(x+4)$ can be obtained by shifting $f(x)$ 4 units to the left, we can obtain the corresponding point of $(8,12)$ as $(4,12)$
(b) As $f(x)+4$ can be obtained by shifting $f(x)$ 4 units up, we can obtain the corresponding point of $(8,12)$ as $(8,16)$