implemented toggle_oven method
call method multiply from give_me_seven
set instance var @name on Animal#initialize
add Animal#adopt method
change size vars to instance vars on Plant class
create getter and setter methods for Box.secret
Refactor read/write methods for Person class into attr_reader/writers
ArrayProblems class method add_cake_to_array now pushes cake to array parameter
ArrayProblems class method uppercase_third_element implemented
Implement class method ArrayProblems#iterate_and_print
Implement class method ArrayProblems#select_higher
implement HashProblems::create_empty_hash
HashProblems::create_veggie_color_hash returns 'red' for tomato and 'green' for kale
Implement HashProblems::update_father_last_name
ArraysAndHashes::iterate_and_print prints each hash element in the supplied array