Calculation of RWA in banking activities

Hello Knime experts !

I need to calculate RWA for a banking activities based on EAD, PD and LDG and maturity.

Currently I have an excel macro or a succession of excel formula with functions that I don’t know which node I can use.

Theses functions are : Ln(x) or NORMDIST().

Does anyone have some tips to help me ?

Regards