Quick Phase I Question

<p>Hey guys - my Telebears was this morning at 12:30. My classes for the upcoming semester are:</p>

<p>Physics 7B
Chem 3B/3BL
Math 53
Engineering 45</p>

<p>I Phase I'd Chem 3BL, Physics 7B, and E45. However, should I switch E45 with Math 53? Is that class hard to get into for phase II?</p>

<p>Assistance would be quite helpful.</p>