HbR is reported to have P$50=14$torr and a Hillcoefficient$=1\mathrm{.}2.$ Calculate $\backslash$Delta YO$2$ for a climber with HbR assuming that, at $14,000$ ft $(4300$m$),$ PO$2=40$mmHg in lungs and PO$2=15$mmHg in muscle capillaries.