6- Determine the minimum amount of fencing required to build the enclosure shown below if it must enclose an area of 128m2 . Each individual cell must be at least 2m by 2 m.( min perimeter=64 m when length = 8 m and width = 16 m) (4 marks) Communication 7 Find the point of tangency and the equation of the tangent line passing through the point p(-4,-2) to the graph of the function f(x)= -2-3x-x2 (3 marks) 8- Consider u=x2, v=1/u+1 and w=Vv find dv/dx (3 marks) Thinking 9- Find the coordinates of the absolute maximum an d minimum points for f(x)=2x2-x4 given x [0,4] (4 marks)