Find a parametrization r(t) of the line through the origin whose projection on the xy-plane is a line of slope 9 and on the yz-plane is a line of slope 4 (i.e. = 4). Consider the first component of r(t) is t. (Use symbolic notation and fractions where needed.) The 2nd component of r(t) = The 3rd component of r(t) =

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