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The chromium in q series of steel samples was determined by ICP emission spectroscopy. The spectrometer was calibrated with a series of standard concentrations of K₂Cr₂O7. The table below shows the calibration data. [K₂Cr₂O7] in µg/mL Emission Readings 4.650 32.25 61.35 a. Using linear regression, determine the equation of the calibration curve. 0.0 2.0 4.0 K₂Cr₂O7] in µg/mL 6.0 8.0 Replication Replicate 1 Replicate 2 Replicate 3 b. The following data were obtained for replicate 1.50-g samples of cement dissolved in HCI and diluted to 100.0 mL after neutralization. Calculate the percent Cr₂O3 in each sample. Blank 7.650 7.200 7.350 Emission Readings 87.50 116.0 Emission teadings Sample A 42.90 42.30 43.35 Sample B 109.7 108.2 spilled