A magnetic field of magnitude 0.48 T is directed vertically upward. (a) Find the magnetic flux through a flat surface of area 19 cm2 if the surface is vertical. (b) Find the magnetic flux through a flat surface of area 19 cm2 if the surface is horizontal. (c) Find the magnetic flux through a flat surface of area 19 cm2 if the surface is at angle of 54° with the horizontal.