Please answer this:)

5) a) Apply the rank order clustering technique to the part-machine incidence matrix in the table that follows to identify logical part families and machine groups. Parts are identified by letters, and machines are identified numerically. (5) B F Machines A 1 1 2 C D E 1 1 1 3 1 1 1 1 1 1 1 5 6 1 1 b) What is the need of Reengineering? Discuss the steps to be performed in Reengineering