3. Describe the steps needed to determine the area of the triangle whose vertices are the origin and the x- and y- intercepts of the line = = #s [3C] 4. Describe the steps needed to find the vector, parametric and symmetric equations of a line that is perpendicular to the xy plane and goes through the origin. Can this equation be used to describe any of the axis? Which one? [3C] 5. Find the acute angle between: L :7 = (0,1)+1(1,-3), reR; Ly :- x-2_y+1 3 -2 [2A]r =(-1,3)+1 WIN 6. Find the distance from P(-1 , 1) to the line defined by [4A] 7. Determine the point of intersection of the two lines if possible: [4A] L :F = (1,2,-3) +/(0,1,-2); and x+1 -28. Determine the vector equation of the line through (1,1,1) that is perpendicular to the two lines: x=-2+3/ [3T] and F = (3,-2,3) +1(-1,2,-3). Y=-1