$4$ Assuming the parameter $m$ for an imaginary fin is known, develop an equation in terms of $m$ that can be used for estimating the fin length $(L)$ if the efficiency of the fin must always be the same irrespective of whether the assumption at the tip is 'infinite length fin' or 'fin with adiabatic tip'.

$m=\sqrt[\phantom{2}]{\frac{h*P}{k*A}}as$ shown $on$ Page $9of$ Lecture Notes $2.$

$($I bonus point$)$