Q3. Calculate the bubble point temperature of the mixture of A and B (XA=0.45, XB = 0.55) at PT = 680 mm Hg by applying the Bi-Section method in Excel platform (The bubble points of pure A and and B are the 371 K and 384 K consequently. ( = 0.1, Absolute Error) 2 e ai bi Ci+T -x = 1 Component a b A 15 2698 -48 B 16 3295 -56 Q4. Take the first derivative of the following function with respect to X1 and X2 respectively by applying the Forward, Backward and Central Difference methods in Excel platform (x1 = 0.7 and x2 = 0.2 h = 0.0001) f(x1, x2) = x - sinx+xxcosx - 0.56 (Solve all of the problems with five digits in same Excel file, but in different sheets and Don't forget to attach your Excel file to EGEDERS system)