Oxygen, with \(p_{t}=95.5 \mathrm{psia}\), enters a diverging section of area \(3.0 \mathrm{ft}^{2}\). At the outlet the area is \(4.5 \mathrm{ft}^{2}\), the Mach number is 0.43 , and the static pressure is 75.3 psia. Determine the possible values of Mach number that could exist at the inlet.