An electrical device was measured for its current, I fluctuates at a number of different values of time, t. The results are given in the table below. Calculate the current, I at t = 1.4 second by using the following methods: t (s) 0.6 1.1 1.5 1.9 I(A) - 0.621a 0.71la 1.91la 6.21 (a) The Lagrange interpolation with Linear and Quadratic approximation. (b) Newton's divided difference.

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