Hand written solution required

A conical pendulum consists of a bob of mass m attached to an inextensible string of length 1. The bob describes a circle of radius r with angular speed @, and the string makes an angle O with the vertical, as shown in the diagram. (i] Find an expression for 0 in terms of @, I and g. The string is replaced with an elastic string of modulus of elasticity & and natural length 4. (ii] Find an expression for the new value of 0 in terms of @, m, g, 1, and 1.