If var $="01234567"$ what Python statement would print out only the even elements?

$pr{\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}(var[$::$1])$

$pr{\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}(var[$:$2])$

print$($var$[$::$3])$

Consider the string Name$=$"EMILY", what statement would return the index of $0?$