$10\mathrm{.}5$ Effects of changes in estimates on depreciation expense

At the end of each year, Patty Chu, the chief accountant at Rex Lin Enterprises, a Singapore$-$based trading company, reviews long$-$term assets at the end of each year to determine whether changes are called for in how these assets are depreciated. In December $2011,$ her attention focused on two assets in particular:

$\backslash$table$[[,$Date acquired,Cost,$\backslash$table$[[$Accumulated depreciation$],[$end of $2011]],$Useful life,Residual value$],[$Warehouse$,\frac{1}{1}\frac{?}{07},$$$200,000,$$$50,000,25$ years,$$10,000$

Caculate the recised annual depresion dxpenses dor eaxj asset in $2012,$ and compare them to what the expenses would be if the changes were not made.