Exercise 3.7 Consider the matrix-vector multiplication programs in Sect. 3.6. Based on the notation used in this section, develop an SPMD program for computing a matrix-matrix multiplication C=AB for a distributed address space. Use the notation from Sect. 3.6 for the communication operations. Assume the following distributions for the input matrices A and B : (a) A is distributed in row-cyclic, B is distributed in column-cyclic order; (b) A is distributed in column-blockwise, B in row-blockwise order; (c) A and B are distributed in checkerboard order as has been defined on p. 114. In which distribution is the result matrix C computed