<prompt> Mstari ufuatao umewekewa vigezo, ili vekta ya mwelekeo wake iwe ya fomu beginpmatrix -7 b endpmatrix. Find b.asyukubwa wa kitengo sentimita 0.4;jozi A, B, L, R;int, n;kwa i -8; i 8; i chorai,-8--i,8,kijivu0.7; chora-8,i--8,i,kijivu0.7;chora-8,0--8,0,Mishale6;chora0,-8--0,8,Mishale6;A -5,4;B -1,3;L uganiA, B, -8,0, -8,1;R kiendeleziA, B, 8,0, 8,1;kuchora L--R, nyekundu;lebox, 8,0, E;leboy, 0,8, N;asy  <response>: Laini hupitia beginpmatrix -5 4 endpmatrix na beginpmatrix -1 3 endpmatrix, hivyo mwelekeo wake wa vekta ni sawia naanzapmatrix -1 3 mwishopmatrix - anzapmatrix -5 4 mwishopmatrix anzapmatrix 4 -1 mwishopmatrix. Ili kupata x-coordinate ya -7, tunaweza kuzidisha vekta hii kwa scalar -frac74. Hii inatupa-frac74 anzapmatrix 4 -1 endpmatrix anzapmatrix -7 74 endpmatrix.Kwa hiyo, b frac74. 