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Problem 5 - 6 points The faculty of a business school's word processing department believes that the number N of words a student can correctly input after t weeks of instruction is given by the function. N(t)=t2+6t+10 a) [30% = 1.8 pts] Determine the value of MS) and provide a sentence describing N(5). b) [70% = 4.2 pts] Determine the value of N'(5) and provide a sentence describing N