EO$13$

a Gv $=$ Gpi $=9(25+1)(4+1)$ Gp$2$ Gdy Gm $3.($: $2)54=1$ S $+12$s $1=0\mathrm{.}05$ G m$2=0\mathrm{.}2$ Gdz $=113$s $+1()$ K$2=4$ dz $$ a