Beginning with this UML class diagram outline (you may download and print UML Class Diagram Template.pdf if you wish or redraw it):
...add the following details (~3pt each; partial credit may be awarded):
Bar is a kind of Foo. (In other words: Bar is a child class of Foo; Bar extends Foo; Bar is a type of Foo.)
Baz briefly uses Bar
Bar has a private property named alpha
alpha is of type bool
Baz has a public method (function) named delta
delta takes one parameter named beta that is of type Foo.
delta returns a value of type float.