`1)`

`->` the name of the hobby is carving eggshells

`2)`

`->` He started the hobby five years ago after a trip to the US where he saw some carved eggshells in an art gallery

`3)`

`->` he did not go to class to learn how to crarve He learned everything from the Internet

`4)`

`->` He learned everything from the Internet

`5)`

`->` yes, Ba does

`\text{1. Carving eggshells }`

$\rightarrow$ My father has an unusual hobby, carving eggshells.

`\text{2. He started the hobby five years ago after a trip to the US (  where he saw some carved eggshells in an art gallery ) }`

$\rightarrow $My dad can make beautiful pieces of art from empty eggshells. It’s amazing. He started the hobby five years ago after a trip to the US where he saw some carved eggshells in an art gallery

`\text{3. No, he didn't}`

$\rightarrow$ My father did not go to class to learn how to carve.

`\text{4. He learned to carve from the internet }`

$\rightarrow$ He learned everything from the Internet

`\text{5. Yes , he does }`

$\rightarrow$ I like carving eggshells, too.