12 Find the local linear approximation of the function f(x) = di+x at Xo = 0 . Hence, approximate do.9 and J..1. 13 Use an appropriate local linear approximation to estimate : ( a ) (3.02 ) * ( b ) ( 1.97 )" 14 Determine the interval where f (x ) = 4 x - 2" Increase or decrease . 15 Locate the critical points, and identify which critical points are stationary points. ( a) f ( x ) = 4x4 - 16 x + 17 ( b) f (x ) = 2+3 ( c) f ( x ) = (x2 - 25 ) 3