address all the questions and show work. 1- For the functionf(x)=4x-6, find the slope of the tangent line atx=-7 2- For the functionf(x)=x^{2}+1, find the equation of the tangent line at x=12. 3- For the functionf(x)=x^{2}-5x+6, find the slope of the secant line betweenx=1andx=5