Assume a mature sequoia tree requires at least 0.6 m^2 of exterior canopy area per cubic meter of trunk volume. Also assume that the canopy can be modeled by a cone whose slant height is 4 times its radius, and that the trunk of the tree can be modeled by a cone whose height is 12 times its diameter. What is the minimum base radius of canopy required for a sequoia with trunk diameter 5 m? Round your answer to the nearest tenth.