Let x = [2,1,3], y = [3,-1,4], and z = [2,6, 4]' (a) What is the...

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Let x = [2,1,3], y = [3,-1,4], and z = [2,6, 4]' (a) What is the dimension of span(x,y,z)? Justify your answer. (b) Give a geometric description of span(x,y,z). Let x = [2,1,3], y = [3,-1,4], and z = [2,6, 4]' (a) What is the dimension of span(x,y,z)? Justify your answer. (b) Give a geometric description of span(x,y,z).