Read the following statements about a cell at the end of prophase of mitosis. (i) The chromosomal material has condensed to form compact mitotic chromosomes. (ii) Each chromosome is seen to be made of two chromatids attached together at the centromere. (iii) The centrosome duplicated during interphase, and the two centrosomes have begun to move towards opposite poles of the cell. (iv) Golgi complexes, endoplasmic reticulum, nucleolus and the nuclear envelope are not seen. (v) The chromosomes are aligned on the metaphase plate. (vi) The centromeres have split, and the sister chromatids have separated. How many of the statements above are correct?