In class, we've learned about the under-damped harmonic oscillator, which has the solution x(t) = x0 * e⁻²ʸᵗ * cos(ωt + ϕ). Plot this solution for 0 ≤ t ≤ 6, with the parameters x0 = 1, ω = 2π, and ϕ = -π/2, for three different damping rates γ = 0, γ = 0.5, and γ = 3. Plot all the curves on the same axes in different colors so they can be compared.