A spiral curve was laid out in a certain portion of the Manila-Cavite Coastal Road. It has a length of spiral of 80m and an angle of intersection of the two tangents of 40degrees. If the degree of curve is 6degrees, determine the following elements of the spiral curve to be laid out. a. Length of long and short tangents b. External distance c. Length of throw d. Maximum velocity that a car could pass thru the curve without skidding.