How to get values from MySQL(5.6) column if that contains JSON document as a string 

For example, if we have a table - employee in that we have three columns
id, name and educations.
and column educations contains data as a JSON document 

```
{"ug":"bsc","pg":"mca","ssc":"10th"}

```

I need the value of ug and pg from educations column 

Can we do that using MySQL(5.6) queries?