Number seven means that you are very busy.
Number 8 means something is very clean or clear
Tell him/her what you did such as, went surfing or went to a museum. Then tel him/her if you had fun and what you really enjoyed
Extending in scope or effect to a prior time or to conditions that existed or originated in the past; especially : made effective as of a date prior to enactment, promulgation, or imposition
Sorry just commenting for algorithm