The parametric equations for the line that is parallel to z-axis and passes through the point (5,3,7) are a. x=5t , y=3t , z=7+t O b. x=5, y=3,z=28+4t C. X=5t , y=3t , z=-t d. x=5, y=3, z=7+4t e. x=5, y=3, z=4t

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