The accompanying data were obtained in a slope-ratio investigation of the complex formed between Ni²⁺ and 1-cyclopentene-1-dithiocarboxylic acid (CDA). The measurements were made at 530 nm in 1.00-cm cells.

(a) Determine the formula of the complex. Use linear least squares to analyze the data.
(b) Find the molar absorptivity of the complex and its uncertainty.

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CCDA = 1.00 x 10-3 M (NI = 1.00 x 10-3 M Ni M Aş3o CDA, M Ag30 5.00 x 10-6 1.20 X 10-5 3.50 X 10-5 0.051 9.00 X 10-6 1.50 X 10-5 2.70 X 10-5 4.00 X 105 0.031 0.123 0.051 0.359 0.092 5.00 X 10-5 6.00 X 10 7.00 x 105 0.514 0.137 0.616 6.00 X 105 7.00 X 105 0.205 0.719 0.240