In a diving test facility, the pressure at the bottom of the test tank must be the same as at the depth of $200$

$m$ of the sea water of specific gravity $1\mathrm{.}03.$ a$)$ Find the air pressure required. b$)$ If the pressure found in $($a$)$ is

increased by $20\%,$ find the depth of sea water which is simulated for a diver located at ledge $A.(T=4C).$