X.
1. Gupima ubushyuhe nyabwo
2. LED yerekana ibisobanuro bihanitse
3. idakoresha amazi, gusohora amavuta, kurwanya ruswa, kurwanya kwivanga
Byakoreshejwe ahantu hashobora gutwikwa no guturika, kimwe no gupima ibintu byangirika.