1)Similar to the ring based allgather operation described in class, write a ring based alltoall function, using nonblocking communications.
2)Using appropriate derived data types, write a dense matrix function to produce the transpose of an nxn matrix. The transpose AT of a matrix A is obtained by making each column of A a row of AT. Assume that A is stored on node 0. Create a derived data type for columns of A. Send each column of A to node 1, but have node 1 store it in the appropriate row of AT. At the end of the function, A should be on node 1 and AT on node 2.
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