Hello, Please help me with this problem. I don't understand it at all. The answers are pictured but I have no clue how they got to them. Explain step by step your approach please and thanks in advance.

The sine-integral function, shown below, is one of the many functions in engineering whose formulas cannot be simplified. There is no elementary formula for the antiderivative of ( sin t) / t. Complete parts (a) through (c) below. X sint Si(x) = t dt Click the icon to view more information. . . . a. Use the fact that |f(4) | $1 on |0,7 to give an upper bound for the error that will occur if S sin t N/a = t dt is estimated by Simpson's Rule with n = 4. 0.00021 (Round to five decimal places as needed.) b. Estimate Si N/ 2 by Simpson's Rule with n = 4. 1.37079 (Round to five decimal places as needed.) c. Express the error bound you found in part (a) as a percentage of the value you found in part (b). ring 0.015% (Round to three decimal places as needed.)