Q3. Happy Hour Message Draw a sequence diagram for the Happy HourMessage scenario in the figure 1 below. Draw only the first five messages exchanged. Scenario name Participating actor instances Flow of events Happy Hour Message bob, alice: BarFlies john: Friend 1. Bob and Alice are sitting in their favorite pub and it's happy hour. They want to invite their common friend John who likes cocktails and didn't know about the newly scheduled happy hour. Alice takes out her "mobile phone" and activates the "SMS" function. 2. Alice enters John's cell phone number and writes the message about the happy hour into the "SMS text field". She sends the message and waits for John's answer. 3. John, who is still at work, is alerted by a sound of his cell phone that a new "SMS" has arrived. He reads the lines from Alice and answers that he will come immediately. He quits working and leaves the office. 4. Alice receives John's answer at her "mobile phone". Figure 1