<p>a) I don’t see why it would be unsafe. 31A is introductory calculus… just the relatively simple limits, derivatives, etc.</p>
<p>b) Yup.</p>
<p>c) Don’t know. But just let your TA know and check up on it.</p>
<p>d) I’m not taking it, but it can’t be much. It’s only one lecture.</p>