B. Given the parametric curve w/ equations x = m (3-+) +at and Find the following: y= 30 61. Point (s) on the curve where the tangent line is horizontal / vertical 52. Eq of tangent line to the curve at (4,1) 63. Interval for t w/c the curve is concave up I concave down by integral that gives the are lengin of the curve from the point (4,1) to the point (in 3, '/3)