Which of the following species are hypervalent -

$1. {\mathrm{AsF}}_5 2. {\mathrm{BF}}_3 3. {\mathrm{SF}}_6, 4. {\mathrm{CO}}_3^{2-}$

A simplified application of MO theory to the hypothetical 'molecule' $\mathrm{OF}$ would give its bond order as:

Of the following isoelectronic $\&$ isostructural species are 

${\mathrm{NO}}_3^{-}, {\mathrm{ClO}}_3^{-}, {\mathrm{SO}}_3 \& {\mathrm{CO}}_3^{2-}$