6. (II) A small fly of mass 0.22 g is caught in a spider's web. The web oscillates predominantly with a frequency of 4.0 Hz (a) What is the value of the effective spring stiffness con- stant k for the web? (b)At what frequency would you expect the web to oscillate if an insect of mass 0.44 g were trapped?

**(a)** The correct approach uses the formula for the frequency of a simple harmonic oscillator: f = 1/(2π)√(k/m), where f is frequency, k is the spring constant, and m is the mass. Solving for k, we get k = 4π²mf². Substituting the given values (converting mass to kg: 0.22 g = 0.00022 kg), we find the effective spring constant k.