Question Number: 15 Correct: 1 Wrong: 0 If the fourth order divided difference of f(x)=ax+5x+3x+2, = R, at the points 0.1, 0.2, 0.3, 0.4, 0.5 is 5, then a equals Question Number: 16 Correct: 1 Wrong: 0 2 If the quadrature rule [f(x) dx = cf (0) +3 f(c), where G, C ER, is exact for all f(x) dx polynomials of degree 1. then c +3c equals