Election contract with percentages

So how do I exactly program this logic into a function? This is part of an election contract with only 5 candidates.

Write a function that returns the winner. In order to have a winner, two conditions should be satisfied as follows:

(i) The winner should have at least the 60% of votes, and

(ii) when (i) holds, the rest votes (<= 40%) should be given to at least 2 candidates.

Otherwise, there is no winner.

Any help is immensely appreciated!