(a)Parameterize and sketch cone shell of the (double) cone around the straight line

g: (1/0/0) +t(1/1/1) with apex at point (1/0/0) and opening angle 30° in R³:

(b) For the surface from (a), give normal vector, vector surface element dA = x, xx, du dv

and scalar surface element do = ||x, xxvll du dv at each surface point respectively