Vector-valued functions (VVF) VVF Point P t value (for point r(t) = ½t²i + √4 − t j + √t + 1k (0, 2, 1) A) 2 4) Write the equation of the tangent line at point P. 5) Graph the curve and the two points A and P on it with MATLAB (Octave). Make sure you graph within the domain. 6) Set up integral to evaluate arch length between points P and A. Approximate the integral using trapz or quad commands.