M1.ptx

<exercise>
  <statement>
      <p>Of the following three matrices, only two may be multiplied.
      <me>
          A=<xsl:value-of select="A"/> \hspace{1em} B=<xsl:value-of select="B"/> \hspace{1em} C=<xsl:value-of select="C"/>
      </me>
      Explain which two can be multiplied and why. Then show how to find their product.</p>
  </statement>
  <answer>
      <me><xsl:value-of select="productName"/>=<xsl:value-of select="product"/></me>
  </answer>
</exercise>