T Let X = (1,0, - 1, - V/2)'. Then, JX ,= Select one: O a. 4 O b. 3 O C. 2 O d. 1Suppose that f(0) = 1, f(0.5) = 2.5, f (1) = 2, and f(0.25) = f(0.75) = a. Using trapezoidal rule with n = 4 gives [ f(x)dx = 1.75, then a= Select one: O a. 3.5 O b. 2.5 O C. 4.5 O d. 1.5In solving IVP numerically, Euler method gives high accuracy with large step-size h. Select one: O True O FalseGiven y =y-t- + 1, Ost