4. Let r(t) = (1 t, 1+ t, 6e). (a) Find an equation for the tangent...

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4. Let r(t) = (1 tª, 1+ t², 6e²). (a) Find an equation for the tangent line to this curve at t = 1. (b) Find an antiderivative R(t) of r(t) such that R(0) = (1, 1, −2). 4. Let r(t) = (1 tª, 1+ t², 6e²). (a) Find an equation for the tangent line to this curve at t = 1. (b) Find an antiderivative R(t) of r(t) such that R(0) = (1, 1, −2).