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4. Find the slope m3\" of the seeant line through the two given points and then calculate mt- = Iii[3: mE-E'l? X) = x2 (a) (2,4), [2+]:|= ( 2 + hf] ugh} {0-5, 0-25), [_5+h, (0.5 + hf] 5. Find the slopes and equations [if the lines tangent to 3? = x} at the given points. a) 113:) = 5x2 2x at (2, 16) and (0,0); h) x) = sin{x) at (r; U} and {j} -I n l 2 Fig. n The graph of}; = x) is given in Fig. 6. (a) At which integers is f enntimmus? (b) At which integers is f dierentiable