The function w gives the number of words per minute (wpm) that a student in a keyboard class can type after t weeks in the course. (a) Is it possible for w(3) to be negative? Explain. W(3) cannot be negative because the lowest number of words typed in a minute is 1 x ? dt t = 3 (b) What are the units on dw O weeks O weeks per wpm wpm per week wpm (c) Is it possible for dw dt to be negative? Explain. t = 3 dw dt can be negative because the number of words typed per minute can decrease at week 3. t = 3