Go to your Virtual Machine and SQL Developer. Bring me the results of the following $($make sure you only bring me the results that I need, don't give me unnecessary attributes, you will lose points$)$:

a$)$ Find the actual size of the database in GB excluding the log files, control files, and parameter files. $($hint use data file view$).$ Only show me the size of the database in GB$.$

b$)$ Find the db$\_$block$\_$size.

write query for both