C++ matrix for beginers 7)Given an M x N matrix. Find the maximum among the minimum elements of its rows 8)Given an integer matrix of size M x N. Find the number of its rows, all elements of which are...

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Extracted text: C++ matrix for beginers 7)Given an M x N matrix. Find the maximum among the minimum elements of its rows 8)Given an integer matrix of size M x N. Find the number of its rows, all elements of which are different 9)Given an M x N integer matrix. Find the element that is the maximum in its row and the minimum in its column. If there is no such element, then output 0.