ECON 331Written Assignment 7due in class Nov. 41.LetA4841284240Use the properties of determinants to show that A is a singular matrix.(i.e. compute the determinant of A using only Theorems 9.1 to 9.8 in the text)2. The demand and supply functions for three related markets are as follows.q1d419p1p2p3q2d40p12p22p3q3d11p12p22p3q1s2p12q2s4p23q3s5p313Write the equilibrium condition for these markets as a matrix equation involving the
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