Question 2 Figure Q2 shows a rectangular enclosure formed by a straight wall AB and a fence CDEF of length 10m. The width of the enclosure (i.e., EF) is x m. Arww D E Figure Q2. A rectangular enclosure (a) Find the value of x which maximises the area of the enclosure. (b) Find the maximum possible area of the enclosure. Hint: Use the second derivative to test for the local maximum.

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