Study the diagram given below and then answer the questions that follow :

(i) Name the part labelled A. Name any two hormones produced by the part labelled A.
(ii) What happens to the part labelled B if :
(1) fertilisation takes place?
(2) fertilisation does not take place ?
(iii) Where does fertilisation occur ?
(iv) Draw a neat diagram of the human sperm as seen under high magnification and label the following parts: (a) Acrosome (b) Mitochondria.