4.—(1) Subject to paragraph 9, the maximum referred to in paragraph 1(1)(a) shall be—
(a)in the case of a single claimant, the appropriate amount in respect of that claimant specified in or determined in accordance with paragraphs 5 to 8;
(b)in the case of a claimant who is a member of a family the aggregate of the following amounts—
(i)in respect of the claimant, the appropriate amount in respect of him specified in or determined in accordance with paragraphs 5 to 8;
(ii)in respect of each member of his family who lives in the home aged under 11, 1½ times the amount specified in paragraph 2(a) of Schedule 1;
(iii)in respect of each member of his family aged not less than 11 who lives in the home, an amount which would be the appropriate amount specified in or determined in accordance with paragraphs 5 to 8 if the other member were the claimant.
(2) The maximum amount in respect of a member of the family aged under 11 calculated in the manner referred to in sub-paragraph (1)(b)(i) shall be rounded to the nearest multiple of 5p by treating an odd amount of 2·5p or more as 5p and by disregarding an odd amount of less than 2·5p.