Explain the calculated order of accuracy p when round$-$off errors dominate. Select all that apply.

Group of answer choices

the value of p is due to the fact that a fourth$-$order finite difference method is used

the value of p is due to a bug in the script or function codes

the value of p is due to the fact that a second derivative is calculated

the value of p is always $-1$ as in the example shown in class