7. If the line integral of [ (8x + y + 6y²e²)dx + (ax + bye² + 3y¹) dy along the curve given by (tk)i + sin(tk/2)j from t = 0 to t = 1 produces the same value for any choice of k, then the sum of parameter a + b must be (a) 14. (b) 22. (c) 13. (d) 7. (e) 9.

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