A pipe carrying water is inclined at an angle of $45^{\circ}$ to the horizontal. A manometer containing a fluid with $\mathrm{SG}$ of 1.2 is attached to taps on the pipe, which are $1 \mathrm{ft}$ apart. If the liquid interface in the manometer leg that is attached to the lower tap is $3 \mathrm{in}$. below the interface in the other leg, what is the pressure gradient in the pipe $(\Delta P / L)$, in units of (a) $\mathrm{psi} / \mathrm{ft}$ and (b) $\mathrm{Pa} / \mathrm{m}$ ? Which direction is the water flowing?