$1-$ In order to determine Archie's parameters for certain reservoir, the following laboratory tests were done on it's rock samples :

Set $1$

$\backslash$table$[[$Porosity $\%,28,33,36,38,40],[$Formation factor,$13,8\mathrm{.}5,9,6,5\mathrm{.}7]]$

Set $2$

$\backslash$table$[[$Formation Resistivity,$m*0\mathrm{.}38,0\mathrm{.}45,],[$Water saturation $\%,\backslash$table$[[100],[$fo$50\mathrm{.}3.]],93,73]]$

Calculate Archie's parameters a$,m$ and $n.$ Define rock sample wettability