Q2) Which of the following sets form a set of fundamental solutions for the ODE 1. y1=e2x and y2=e7x 2. y1=x2 and y2=x2lnx 3. y1=e2x and y2=xe2x 4. y1=x2 and y2=x7 5. y1=e2xcos(7x) and y2=e2xsin(7x)