d. Thus, some values
              of type <code class="computeroutput"><span class="identifier">X</span></code> are not representable
              in the type <code class="computeroutput"><span class="identifier">Z</span></code>, they
              fall out of range <code class="computeroutput"><span class="special">(-</span><span class="number">2.0</span>
              <span class="keyword">and</span> <span class="special">+</span><span class="number">2.0</span><span class="special">)</span></code>.
    