Let’s learn Japanese with manga. What you are going to learn on this page is:
The most common Japanese word for ‘yes’ is はい. うん tends to be used by young people amongst friends.
分かった（わ・かった）is the past tense of 分かる which means ‘understand’.
(That is fine.)
いい means ‘good’. よ is placed at the end of a sentence so that you could sound soft.