1. A wire is parametrized by (t, 5t – 3,3 – t2) from 0 st<1. (a) The density of the wire is given by p(x, y, z) = Vī g/cm. What is the total mass of the wire? (b) An electric field is given by E(x, y, z) = (y+ 3, 2x, 2ar + z). What is the work done by the field on an electron moving along the parametrization?

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