The first exam is during class on Wednesday, 21 Feb. Exams from the last semester I taught this course can be found here. Material is being gone over in a different order than than those exams, though.
The first exam can be found here. Solutions and grading guidelines are available here.
Regrades, for either the homeworks or the exams, can be done by filling out the regrade form, attaching it to the exam or homework, and turning it in.
The second exam is during class on Wednesday, 4 April.