A cam with a translating flat-face follower is desired to have the follower motion y (θ) = 4[2πθ – θ²], 0 ≤ θ ≤ 2π Contact stress considerations dictate that the radius of curvature of the cam profile should not be less than 40 mm anywhere. The minimum permissible base circle radius is _____ mm (round off to one decimal place).