Aubree, a College Freshman, Took 15 Hours Her First Semester

Essay

Aubree, a college freshman, took 15 hours her first semester.Below is her grade report. $$\begin{array} { l l l } \text { Class } & \text { Credit Hours } & \text { Grade } \\\text { Physics } & 4 & \text { D } \\\text { Brology } & 4 & \text { B } \\\text { Statistics } & 3 & \text { B } \\\text { Seminar } & 1 & \text { A } \\\text { Macroeconomics } & 3 & \text { A }\end{array}$$ Aubree's university uses a 4-point grading system, i.e., A=4, B=3, C=2, D=1, F=0.
a.
Compute Aubree's grade point average at the end of the semester.
b.
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The next semester, Aubree retakes physics and makes a B. If this B replaces her old grade (D), what would her revised GPA be? (Assume the only class she took her second semester was physics.) (Round to the nearest hundred.)