Please help

Let f(x) = x - 1. We want to find the equation of the tangent line to this curve at x = 2. a. Begin by writing the equation for the slope of the secant line through the points (2, f(2)) and (a, f(a)), where a is a real number. b. The expression you have written is a function of a. This function has a removable discontinuity. What value do you need to give this function to remove this discontinuity? c. The value from part (b) is also the slope of the tangent line at x = 2. Use this to write the equation of the tangent line to f(x) at x = 2