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A man who is going bald, pays for a new treatment to increase the number of hairs on his head. After t weeks of treatment the number of hairs is given by the equation Hg) 5 E9 - 2:2 + 5:: + 4', where 0 g t S 4 and H is measured. in thousands of Elli-airs, Use Cnalulus and basic arithmetic to_.determine the highest number bf hairs. the man is expected to have. [6 marks]