Quiz 3 — Calling multi-functions

Here are the three variants of the function.

multi sub func(Int $a) { 1 }
multi sub func(Rat $a) { 2 }
multi sub func(Num $a) { 3 }

Which calls are valid?

1	func(4)
1	func(4e4)
1	func(4/4)
0	func('4')	There is no `multi sub func(Str $a`).
1	func(4.4)

What do the calls return?

1	`func(4)` returns (: 1, 2, 3 :)
2	`func(4.4)` returns (: 1, 2, 3 :)	`4.4` is a `Rat`.
2	`func(4/4)` returns (: 1, 2, 3 :)	`4/4` is also a `Rat` number.
3	`func(4e4)` returns (: 1, 2, 3 :)	A number in scientific notation is `Num`.

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