need A and B, please and thank you!

This year, Sigma, Incorporated generated $627,000 income from its routine business operations. In addition, the corporation sold the following assets, all of which were held for more than 12 months: *Through date of sale. Required: a. Compute Sigma's taxable income assuming that it used the straight-line method to calculate depreciation on the building and has no nonrecaptured Section 1231 losses. b. Recompute taxable income assuming that Sigma sold the securities for $159,500 rather than $72,750. Complete this question by entering your answers in the tabs below. Compute Sigma's taxable income assuming that it used the straight-line method to calculate depreciation on the bullding and has no nonrecaptured Section 1231 losses. Complete this question by entering your answers in the tabs below. Recompute taxable income assuming that Sigma sold the securities for $159,500 rather than $72,750