Irma$$s production function is f$($x$1,$ x$2)=($min$\{$x$1,5$x$2\})12.$ If the price of factor $1$ is w$1=$ $$5$ and the price

of factor $2$ is w$2=$ $$20,$ then her supply function is given by the equation

a$.$ S$($p$)=$ p $18.$

b$.$ S$($p$)=$ p$($max$\{$w$1,5$w$2\})2.$

c$.$ S$($p$)=$ p$($min$\{$w$1,5$w$2\})2.$

d$.$ S$($p$)=9$p$.$

e$.$ S$($p$)=$ min$\{5$p$,100$p$\}.$