$2\mathrm{.}9.$ In a $6-$in$.$ steam line at $400F$ the unit resistance for the condensation of steam at the inside pipe wall has been found experimentally to be $0\mathrm{.}00033(hr)(f{t}^2)\frac{F}{B}tu.$ The line is lagged with $\frac{1}{2}$ in$.$ of rock rool and $\frac{1}{2}$ in$.$ of asbestos. What is the effect of including the condensation and metal pipe$-$wall resistances in calculating the total heat loss per linear foot to atmospheric air at $70F?$