At the end of each year the faculty for a graduate program examine the progress that each graduate student has made on their required thesis. Past records indicate that 30% of graduate students complete the thesis requirement (C) and 10% are dropped from the program for insufficient progress (D), never to return. The remaining students continue to work on their theses and remain current graduate students (G).
Construct a 3 x 3 matrix A that describes the student population's movement within the graduate program over each one year period. Label the rows and columns of A beginning with G and ending with D.