P

_{fl}=((T-T'')/(T-T')) P_{w }Assume that all of the tensions (T, T', and T'') were measured and P_{w }is a known constant. Give a valid expression for the uncertainty of P_{fl}. So far I have_{u=T-T'' and z=T-T'}

Pfl=(u/z)Pw--->(ΔP

_{fl}/P_{fl})=(Δu/u)+(Δz/z)P_{w}---->Δu=zΔx+Δy--->_{ }(ΔP

_{fl}/P_{fl})=((Δx+Δy)/(T-T''))+(Δz/z)Can someone please help me with this problem?