Bob and Alice what to conduct some activities, please state…

Bob and Alice what to conduct some activities, please state which key (Bob’s or Alice’s key) to use in the following scenarios: Use – Bob’s Public Key, Bob’s Private Key, Alice Public Key, Alice Private Key   Bob wants to send Alice an encrypted message             Key:_________________   Alice wants to read an encrypted message send by Bob. Key:_________________   Bob wants to send Alice a message with a digital signature. Key:_________________   Alice wants to see Bob’s digital signature. Key:_________________   Bob receives an encrypted message from Alice. Key:_________________