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**scubasteve94** 100m of angle steel is used to make a rectangular frame with three crossbars in the figure.

Figure attached

a) if the width of the frame is xm, determine an expression for *l,* the length of the frame in metres, in terms of x.

b) the frame is to be covered by light aluminium sheeting. if the area of this sheeting is Am^2, formulate a rule of A in terms of x.

c) Sketch the graph of A against x stating the axes intercepts and turning point. you will need to consider an appropriate domain.

d) Find the maximum area and the value of x which gives this area.