The length of a vine during a 12-hour period is given by a twice differentiable function where L (t) is measured in feet and is measured in weeks for O the intervalo SES 12. Selected values of the derivative of L, L' (t), are given in the table above. At time , the length of the vineis feet S 12. The graph of Lis concave down on (a) Use the tangentine approximation for Latime reason for your answer to estimate L (4.3), the length of the vine attimet 43 the approximation an overestimate or an underestimate for L(4.3)