(b) the aggregate of all amounts each of which is, in respect of the taxpayer for the year, i. the amount that would be determined under subparagraph c of the second paragraph of section 142.1 if each year referred to in that subparagraph ended after 17 October 2000 or is determined under subparagraph d of that second paragraph,
ii. 3/4 of the amount that would be determined under subparagraph c of the second paragraph of section 142.1 if each year referred to in that subparagraph ended after 27 February 2000 but before 18 October 2000 or is determined under subparagraph e of that second paragraph, and
iii. 2/3 of the amount that would be determined under subparagraph c of the second paragraph of section 142.1 if each year referred to in that subparagraph ended before 28 February 2000 or is determined under subparagraph f of that second paragraph.