b) Write down three inequalities which define the shaded region R in the diagrams below.Answer ALL questions. 15y-4x = 60 Q1 Sy + 8x - 40 8 C 6 ST & = 80 B E F D G H 0 15 20 10v + x = 20 a) Write down the region that fulfils according to the constraints below: (i) 5y + 8x 2 40 5y-8x 2-80, 10y + x 2 20, 15y - 4x = 60 [1] 5y + 8x 2 40 5y- 8x 20, 15y- 4x 2 60 [1] (iii) 5y + 8x 2 40 5y-8x 2-80, 10y+ x 20, 15y-4x = 60 [1] (iv) 5y + 8x 60 [1] (vii) by + 8x 240 5y-8x -80, 10y + x 2 20, 15y - 4x = 60 [1]\f