please help me solve question 1, 2 and 3

1. Find the vector equation of the line with parametric equations x=3t8,y=4t3,tR. 2. Solve for the slope of the following 2 lines and state if the lines are parallel, perpendicular or neither? 3x4y+8=0&4x+3y3=0 3. Find the parametric equations of the line passing through the points P(2,5,4) and Q(4,3,2) ? [3