Evaluate the following conditions and state true or false
 
i) 40\(+\)(11 \(+\) 26) \(=\) (40 \(+\) 11)\(+\)26
 
ii) 5\(-\)(11\(-\)26) \(=\) (5\(-\)11)\(-\)26 
 
iii) 40 \(+\) (\(-\) 40) \(= 0\)
 
iv) 5 \(+ 0 = 0\)