The first was already identified, so here is the second and third:
2. Light business aeroplane for the five passangers proposed by K. Koehler from Munster. It is supposed to be very quiet because of the unique propulsion system - water cooled (piston?) engine mounted on the external fuselage, that used transmission gear to power two ducted propellers with the small diameter.
3. It is "project of the new multipurpose plane SE-100 from the design bureau in Kiev". It can satisfy all the specifications, usually set for the agricultural plane, but it can be used also for the archelological survey, medical transport, paradrop or photographic reconnaissance and mapping. It is expected by the Soviet engineers, that with the An-2 class engine (its written "engines", but I can see only one) it can transport 2500 kg of cargo with the 235 km/h cruise speed. For take off it needs only 120 m of unprepared runway.