A declarative programming language is used to allow clients to choose daily activities at the beach. 01 activity(paddleboarding). 02 activity(sailing). 03 activity(rowing). 04 activity(kayaking). 05 activity(jetskiing). 06 client(stevie). 07 client(antonio). 08 client(henry). 09 client(eliza). 10 client(rebeka). 11 client(danny). 12 client(erik). 13 client(simone). 14 client(petra). 15 client(frankie). 16 choice(petra, rowing). 17 choice(frankie, sailing). 18 choice(erik, sailing) 19 choice(eliza, rowing) 20 choice(stevie, jetskiing). 21 choice(henry, sailing). 22 done(henry, jetskiing). 23 done(rebeka, jetskiing) 24 done(antonio, kayaking) These clauses have the meanings: Clause Meaning 01 Paddle boarding is an activity. 06 Stevie is a client. 16 Petra has chosen rowing. 22 Henry has already done jet skiing.

1. (a)Jane is a client who would like to choose the activity surfing and she has already done sailing. Write additional clauses to represent this information. 25 26 27 28[4]
2. (b)Using the variable List, the goal: choice (List, rowing) returns List = petra, eliza Write the result returned by the goal: choice (List, sailing) List =[1]
3. (c)c is a client who would like to choose A if A is an activity and c has not already done A. Write this as a rule: may_choose_activity(C, A) IF[4]