Study the following information carefully and answer the questions below.
(i) ′P×Q′ means 'P is the brother of Q'.
(ii) ′P−Q′ means 'P is the mother of Q'.
(iii) ′P+Q′ means 'P is the father of Q'.
(iv) ′P÷Q′ means 'P is the sister of Q'.
How is M related to K in the expression ′B+K÷T×M′ ?