Update 02.ptx (#392)

Quick typo fix to Activity 8.2.14(b): ia changed to is

source/calculus/source/08-SQ/02.ptx

@@ -354,7 +354,7 @@
         </task>
         <task>
             <p>
-                Which of the following ia most likely true about <m>\left\{\displaystyle \frac{4n(-1)^n}{n+1}\right\}_{n=0}^\infty</m>?
+                Which of the following is most likely true about <m>\left\{\displaystyle \frac{4n(-1)^n}{n+1}\right\}_{n=0}^\infty</m>?
                 <ol marker="A." cols="2">
                     <li><m>\left\{\displaystyle \frac{4n(-1)^n}{n+1}\right\}_{n=0}^\infty</m> converges to 4.</li>
                     <li><m>\left\{\displaystyle \frac{4n(-1)^n}{n+1}\right\}_{n=0}^\infty</m> converges to 0.</li>