[1 point) ' Part 3: The tangent line Now let's calculate the tangent line to the function f(:r:) : a: + 3 at a: : 4. a. By using 1" (1:) from part 2, the slope of the tangent line to f at a: : 4 is f'(4) : [j . b. The tangent line to f at a: : 4 passes through the point (4, f(4)) : [j on the graph off. (Enter a point in the form (2, 3) including the parentheses.) c. An equation for the tangent line to f ata: = 4 is y = [