Question 2 (2 marks) The year level coordinators for Years 7 to 11 at the school are Amy (A), Brian (B), Claire (C), Daisy (D) and Ellie (E). A faulty telephone system means that some of these coordinators cannot directly call other coordinators. The communication matrix, M, below shows which of these coordinators can directly call another coordinator. A receiver A B C D E 1 0 10 B10100 M=caller C 00011 D001 01 E 0 1 1 0 0 The '0' in row D, column A of matrix M indicates that Daisy cannot directly call Amy. The '1' in row D, column C of matrix M indicates that daisy can directly call Claire. a. Write the names of the coordinators who can call Brian directly. 1 mark b. Claire wants to send a message to Amy using the least number of other coordinators. Write, in order, the names of the coordinators Claire must use to send this message to Amy. 1 mark