Task 2

#!/bin/bash
tes=0
tos=0
ls -l $1 |
( while read file_parm
do
        size=`echo $file_parm | cut -f 5 -d " "`
        name=`echo $file_parm | cut -f 9 -d " "`
        let "mod=size%2"
                if [ ! -d $name ]
                then
        if [ $mod -eq 0 ]
        then
                let "tes=tes+size"
        else
                let "tos=tos+size"
                fi
        fi
done
if [ $2 = "even" ]; then
echo "$tes"
else
echo $tos
fi )