7-19. A fighter jet shown in Fig. P7.19 travels directly toward a missile launched 2500 miles away. If the jet is flying 150 mph faster than the missile and they meet in 2 hours, the velocity v of the jet and the velocity v2 of the missile satisfy the fol- lowing system of equations: 2v+2v = 2500 V = V+150 (a) Write the system of equations in the matrix form Ax=b, where x= (b) Determine v and v using the matrix algebra method. Perform all matrix computations by hand and show all steps. (c) Determine v and v using Cramer's rule. (d) Determine v and v using the sub- stitution method. Perform all nec- essary computations and show all steps.