Evaluate the following expressions.

(a) log3(1243)=\displaystyle {{\log}_{{{3}}}{\left({\frac{{{1}}}{{{243}}}}\right)}}=  

(b) log81=\displaystyle {{\log}_{{{8}}}{1}}=  

(c) log41024=\displaystyle {{\log}_{{{4}}}\sqrt{{{1024}}}}=  

(d) 6log65=\displaystyle {6}^{{{{\log}_{{{6}}}{5}}}}=