Perform the following RSA key generation steps. Each step must satisfy the requirements for a legitimate RSA key.

Suppose $n$ is $55.$ Find suitable $p$ and $q$ values.

Compute $(n).$

If $d=7,$ compute a valid value for $e$ and specify the public and private keys.

If Bob uses the same $n$ for his key pair, and his public key is $3,$ what is his private key?

Is it a good idea for multiple users to have public key pairs based on the same n$?$