A three$-$phase load of three equal impedances connected in delta, when connected across a balanced $400$ V supply, takes a line current of $10$ A at a power factor of $0\mathrm{.}7$ lagging. Calculate:

a$)$ The phase current

b$)$ The total power

c$)$ The impedance

If the load is now connected in star what will be the new phase current and total power?

$[5\mathrm{.}77A$;$4\mathrm{.}85kW$;$3\mathrm{.}3A$;$1\mathrm{.}62kW]$