Find dy/dx and d²y/dx2, and find the slope and concavity (if

Last updated: 7/8/2022

Find dy/dx and d²y/dx2, and find the slope and concavity (if possible) at the given value of the parameter. (If an answer does not exist, enter DNE.) Parametric Equations Point x = 6 cos θ, y = 6 sin θ θ = π / 4