Chapter 3.3, Problem 7P

General Solutions of Systems. In each of problems 1 through 12, find the general solution of the given system of equations. Also draw a direction field and a phase portrait. Describe the behaviour of the solutions as $t\to \infty$.

$x\text{'}=\left(\begin{array}{cc}\frac{5}{4}& \frac{3}{4}\\ \frac{3}{4}& \frac{5}{4}\end{array}\right)x$