How many register use in Pentium 3?

A small sphere of charge q = +68 uC and mass m = 5.8 g is attached to a light string and placed in a uniform electric field E that makes an angle O = 37 degrees with the horizontal. The opposite end of the string is attached to a wall and the sphere is in static equilibrium when the string is horizontal.
(a) Find the magnitude of the electric field.
(b) Find the tension in the string.