Nested And / Or Statements in query

I want to build the following query

Where (name =‘a’ or name=‘b’) AND (age>8 and age <90)

When I build this with

$query->andWhere and $query->orWhere

I seem to fail on the nesting of the queries… any suggestions

I really hate when that happens… pressing post and then having a brainwave and fixing it… Sorry about that

$query->andWhere( ["or", …

solved it