Two sinusoidal water waves travel side-by-side through the same region. Wave 2 has the same frequency and wavelength as Wave 1 but an amplitude that is 1.5 times larger. What is the ratio of the energy transported per unit time by Wave 2 to that transported by Wave 1?
a) 4.5
b) 1.5
c) 2.25
d) 3.375