Suppose that a=0.0000432\displaystyle {a}={0.0000432} and b=0.000000108\displaystyle {b}={0.000000108}. Write each of the following in scientific notation. If needed, round to the nearest thousandth in the answer.

a=\displaystyle {a}=  

b=\displaystyle {b}=  

ab=\displaystyle {a}{b}=  

ab=\displaystyle \frac{{a}}{{b}}=