Given IP address : $ \color{purple} {47.72.152.188/29}$
Here we have N/W bits =$29$ , remaining $3$ bits are allocated for hostid.
In Network address all host bits are set to $0$.
Here we have 3 host bits of last octet $ \Rightarrow 10111000$
So,N/W address is $47.72.152.184$
In Broadcast address all host bits are set to $1$
Here we have 3 host bits of last octet $ \Rightarrow 10111111$
So,Broadcast address is $47.72.152.191$
Subnet mask is all $1's$ in N/W id part.
$255.255.255.248$