What is the radius of a circle For the equation x squared plus y squared minus 8 x minus 4 y minus 16 equals 0
​,
do the following.
​(a) Find the center​ (h, k) and radius r of the circle.
​(b) Graph the circle.
​(c) Find the​ intercepts, if any.
​(a) The center is left parenthesis 4 comma 2 right parenthesis
.
​(Type an ordered​ pair.)
The radius is requals
6
.
​(b) Use the graphing tool to graph the circle.
​(c) Find the​ intercepts, if any. Select the correct choice below​ and, if​ necessary, fill in the answer box to complete your choice.