Consider the following statements:
\[
\begin{aligned}
(i) &\ \text{Perform addition/subtraction on the mantissas}
(ii) &\ \text{Set the exponent of the result}
(iii) &\ \text{Choose the number with the smaller exponent and shift its mantissa}
(iv) &\ \text{Normalize the result}
\end{aligned}
\]
Find the correct add/subtract rule sequence.
