X y 1.2 10 sin (6) 2 10sin (7) 2.8 10 sin(8) 3.6 10 sin(9) 4.4 losin(10) 5.2 10 sin(11) Approximate (2.9286) using! a) lagrange method with a fourth order polynomial b) Netwon divided deffernee method with a fourth order polynomial