A research station records temperature changes over four consecutive time periods. The table shows the temperature at the start of each period and the change during that period.

Period	Starting temperature	Change
1	\(-6^\circ\text{C}\)	\(+11^\circ\text{C}\)
2	result of Period 1	\(-\frac{3}{2}\) of the Period 1 rise
3	result of Period 2	\(+\frac{5}{4}\) of \(8^\circ\text{C}\)
4	result of Period 3	\(-25\%\) of \(18^\circ\text{C}\)

What is the final temperature after all four changes have been applied?