# CG Q$4-$ Use the sum$()$ function on a logical vector to find

###### the number of movies that are longer than $2$ hours and have

###### a PG certificate.

# CG Q$5-$ Use the mean$()$ function to find the average

###### rating for movies that are longer than $2$ hours

###### and have a PG certificate.

# CG Q$6-$ Use the mean$()$ function to find the average

###### budget for movies that are longer than $2$ hours

###### and have a PG certificate.

# CG Q$7-$ Use the mean$()$ function to find the average

###### rating for movies that are no more than an hour and $40$ minutes

###### and have a PG $13$ certificate.