We wish to construct a matrix with 19 rows and 86 columns, with entries xij∈{0,1,2} (1≤i≤19,1≤j≤86), such that:(i) in each column there are exactly k terms equal to 0;(ii) for any distinct j,k∈{1,...,86} there is i∈{1,...,19} with xij+xik=3.For what values of k is this possible? linear algebramatrixlinear algebra unsolved