Question: How to plot piecewise function with single value showing in the plot

I would like to plot a piecewise function. g := x -> piecewise(x < -1, x + 1, x = 1, 4, 2 < x, x^2) with showing the value of 4 using plot command. How to do that? 
As I using the command plot(g, -5 .. 5, -5 .. 5, discont = true, thickness = 3), the value of 4 when x = 1 did not show up.

 

Please Wait...