Analysing a tubular structure, we discover that there exists a problem of resonance between the first mode and the frequency of the sinusoidal force applied to the component. To avoid resonance we want to increase the first natural frequency. Hence as a designer, you recommend to: Question 4Answer a. Increase the wall thickness of the tubes such that the mass increases more than the stiffness. b. Decrease the Young Modulus. c. Increase the wall thickness of the tubes such that the stiffness increases more than the mass. d. Use a material with a higher density but the same Young modulus.. THE ANSWER IS C