Consider the following specification level UML class diagram:

$($i$)$ Indicate which UML diagram type and element$($s$)$ would be most

suitable for representing each of the following concepts:

$$ A member variable in a class.

$$ Object$-1$ calling a function in object $-2.$

$$ The order that certain operations are executed.

$$ Which objects collaborate to achieve some outcome.

$$ C$++$ inheritance.

$$ A class that contains other classes where the lifetime of instances of

the contained classes are tied to the lifetime of the containing class.

$($ii$)$ Write the skeleton code $($C$++$ or Java style pseudocode$)$ implied by the

class diagram above.