Total number of lone pair electrons around oxygens in diethyl peroxide is / are     

Formula of diethyl peroxide is ${\mathrm{C}}_2{\mathrm{H}}_5-\mathrm{O}-\mathrm{O}-{\mathrm{C}}_2{\mathrm{H}}_5$. Each oxygen atom of diethyl peroxide has two lone pairs of electrons. In total, diethyl peroxide is 

${\mathrm{C}}_2{\mathrm{H}}_5-\underset{..}{\overset{..}{\mathrm{O}}}-\underset{..}{\overset{..}{\mathrm{O}}}-{\mathrm{C}}_2{\mathrm{H}}_5$, there are four lone pair of electrons.