Q$1$:

A Saudi Arabian black oil has a bubble$-$point pressure of $1250$ psia at reservoir temperature of

$142F.$ Producing gas$-$oil ratio $(R_p)$ is $364SC\frac{F}{S}TB$ of $0\mathrm{.}872$ specific gravity gas and $40\mathrm{.}2\frac{A}{P}$I

stock$-$tank oil. Estimate the oil viscosity at the initial reservoir pressure of $2880$ psia.