0 52 14z and the reverb is more than or equal to this expression 2z 96 where z represents the number of instruments in the mix These expressions can be written as inequalities ys 0 52 14z y2 2 96 Here s a graph of these two inequalities 80 401 15 30 X a Explain what steps you would take to find the points of intersection of the two curves on the graph b Determine which of the following points lie in the optimal range 8 80 16 100 22 80 20 80 16 60 19 5 73 6 c How do you know which of these points is in the optimal range when you use the graph d How would you prove which of these points are in the