please answer all questions. Required to use MATLAB Software & EXCEL

a) In your opinion, what is the significance of the Ordinary Differential Equation (ODE) in solving problems related to Chemical Engineering? Explain. b) Given a function, y=12x!+3x2x#6x$+4.5x+2 i) Derive the ODE equation for the function. ii) Find the value of y when x=5 using Euler Method. Define your own step size and initial condition. iii) What shall you do to obtain a more accurate y value from 2(b)(ii)