Help pls!!! It has to be used in the table

(a) compute the maclaurin polynomial m2(x) for f(x) = cos x. (b) use the polynomial of part (a) to estimate cos π 12. (c) use a calculator to compute the error made using the estimate from part (b) for the value of cos π 12. remember that the error is defined to be the absolute value of the difference between the true value and the estimate.

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.