Encuentro un vector tangente unitario a la curva r(() = -7/ + 4/2, y determine ?'(2). O a. T(2) = 4 1+ 16 305 305 O b. T(2) = -7 i+ 16 305 305 O c. T(2 ) = 16 7 305 i- 305 O d T(2) = -14 16 ~305 305 Moving to the next question prevents changes to this