PLease answer the question correclty.

Q1. Suppose A wants to send a message to B with a public key encryption. Let and be A's public key and private key, respectively; use similar abbreviations for B. Suppose C knows both public keys byt neither private key. If A sends a message to B, what encryption should A use so thata only B can send decrypt the message? (This property is called secrecy) Can A encrypt a message so that anyone receiving the message will be assured the message came only from A? (This property is called authenticity.) Can A achieve secrecy and authenticity in one message? WHY OR WHY NOT?

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