The bob of a pendulum at rest is given a sharp hit to impart

The bob of a pendulum at rest is given a sharp hit to impart a horizontal velocity .V10 gl, where 1 is the length of the pendulum. Find the tension in the string when

(a) the string is horizontal,

(b) the bob is at its highest point and

(c) the string makes an angle of $60^{\circ}$ with the upward vertical.