(a) Find a rectangular equation for the parametric equation:
x= 3t, y= t+7
(b) Find an equation for the line tangent to the curve at the point defined by the given value of t:
x= 8t^2 -5, y= t^2, t=1
(c) Find the length of the curve:
x= `/3(t^3-3t), y= t^2 +5, 0≤ t ≤ 1