4. A wire has the semicircular shape shown and has density function p(x, y) = x + 1. a) Symbolically construct a line integral to find the mass of the wire. (no x", y's, r's or t", just conceptual symbols) b) Determine a parameterization of the curve that describes the wire. c) Evaluate your integral to find the total mass of the wire. 1 0 1

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