An oil preheater consists of a single tube of \(10-\mathrm{mm}\) diameter and 5-m length, with its surface maintained at \(180^{\circ} \mathrm{C}\) by swirling combustion gases. The engine oil (new) enters at \(70^{\circ} \mathrm{C}\). What flow rate must be supplied to maintain an oil outlet temperature of \(105^{\circ} \mathrm{C}\) ? What is the corresponding heat transfer rate?