A high pressure cell has a volume of $0\mathrm{.}45f{t}^3$ and contains gas at $3500$ psia and $135F,$ at which condition its deviation factor is $0\mathrm{.}75.$ When $43\mathrm{.}6SCF$ measured at $14\mathrm{.}7a$ and $60F$ were bled from the cell through a wet test meter, the pressure in the cell dropped to $1000$ psia, the temperature remaining at $135F.$ What is the gas deviation factor for the gas in the cell at $1000$ psia and $135F?$