Problem $4$: $(20$ points$)$

In Figure $4$ determine $p$ between points A and B $.$ All fluids are at $20C.$ Assume ${}_{\text{B}\text{e}\text{n}\text{z}\text{e}\text{n}\text{e}}=8640\frac{N}{m^3},{}_{\text{M}\text{e}\text{r}\text{c}\text{u}\text{r}\text{y}}=133100\frac{N}{m^3},{}_{Kerosene}=7885\frac{N}{m^3},{}_{\text{w}\text{a}\text{t}\text{e}\text{r}}=9790\frac{N}{m^3},$ and ${}_{\text{a}\text{i}\text{r}}=12\frac{N}{m^3}.$