Find the derivative of the function using the definition of derivative. f(t) = 5.5t + 6t f'(t)= State the domain of the function. (Enter your answer using interval notation.) State the domain of its derivative. (Enter your answer using interval notation.) Use the given graph to estimate the value of each derivative. (a) f'(-3) (b) f'(-2) 0 (c) '(-1) (d) f'(0) (e) f'(1) (f) f'(2) 0 (9) f'(3) y=f(x)