For each of the integrals below, decide (without calculation) whether the integrals are positive, negative, or zero. Let D be the region inside the unit circle centered on the origin, R be the right half of D, T be the top half of D (a) SR(5y + ) dA is ? (b) Sr 5æ dA is ? (c) Sr(5a? + a*) dA is ? (d) (. 5u dA is 2

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