Firstly we put the equation of the line into form so we can find the gradient.
So we see the gradient of the line is -5/4. The gradient of a line perpendicular to a line with gradient m is so we see the gradient of a line perpendicular to your line is .
So we know it's a line with gradient 4/5 passing through (5,2) hence
.
For the parallel line, you use the same gradient as the original which is -5/4 and using the fact that it passes through (5,2) repeat the process from above to find the line. I'll leave this one up to you!