Given the dаtа Time 0 2 4 5 7 9 pH 7.6 7.2 7.1 6.5 7.5 7.2 Cаlculate the value оf pH fоr time = 3.3 hоurs using Lagrange interpolating polynomials of order 2. Choose the sequence of the points of your estimates to attain the best possible accuracy. This part should be done by hand, showing all the steps.