MATLAB: Draw 3D object.write code in 2016a version. Help me,thanks!

Question

z=1-x^2 ,z=0,y=0,y=3

Answer 1

x = linspace(0,3) ;
y = linspace(0,3) ;
[X,Y] = meshgrid(x,y) ;
Z = 1-X.^2 ;
surf(X,Y,Z)
shading interp