What CSS declaration would one use to convert the class .grid into a grid layout? Fill in the blank with exact code one would use (careful with syntax and don't forget the semicolon).

.grid { }

Avariable definition defines the name of a variable that will be used in a program, as well as

Using a conditional expression, write a statement that increments numusers if updatedirection is 1, otherwise decrements numusers. ex: if numusers is 8 and updatedirection is 1, numusers becomes 9; if updatedirection is 0, numusers becomes 7.

Which two technologies support the building of single-page applications?