What is the position of centre of gravity of a:

(a) rectangular lamina
(b) cylinder?

At which point is the centre of gravity situated in :

(a) A triangular lamina and

(b) A circular lamina?

State whether the following statements are true or false.

(i) 'The position of centre of gravity of a body remains unchanged even when the body is deformed'.

(ii) 'The centre of gravity of a freely suspended body always lies vertically below the point of suspension'.

Define the term 'centre of gravity of a body'.