(a) Find the slope m of the tangent to the curve y = 7/ vx at the point where x = a > 0. m = X (b) Find equations of the tangent lines at the points (1, 7) and (4, ?) y ( x ) = X Your answer cannot be understood or graded. More Information (at the point (1, 7)) y ( X ) = at the point (4, 2) ) (c) Graph the curve and both tangents on a common screen. 15 15- 10 10 5 5/ -4 -2 X 2 4 -4 -2 2 4 -51 -10 10 O -15 4 15 15 10 10 5 -4 -2 2 4 -4 -2 2 -5 -10 -10 O -15 /