3.28 A vector field is given in cylindrical coordinates by Point P = (2,n,3) is located on the surface of the cylinder described by r = 2. At point P,

find: (a) The vector component of E perpendicular to the cylinder. (b) The vector component of E tangential to the cylinder. \mathbf{E}=\hat{\mathbf{r}} r \cos \phi+\hat{\boldsymbol{\phi}} r \sin \phi+\hat{\mathbf{z}} z^{2}