A pattern catalog consists of the following design patterns:

Strategy

Composite

Adapter

Publisher$-$Subscriber

Abstract Factory

Master$-$Slave

Wolf$-$Sheep

Proxy

Match each of the following scenarios with the pattern from this catalog that is best suited to model it$.$

a$.$ A controller needs to react to button clicks.

b$.$ A programming language provides a collection of simple commands such as add and multiply, but also provides a block command that allows programmers to group multiple commands into a single, sequentially executed command. For example: $\{$add; mul; $\{$ add; add $\}\}$

c$.$ An executive needs a secretary to screen calls. The secretary needs and secretary to pre$-$screen calls. The secretary$\text{'}$s secretary needs a secretary to pre$-$pre$-$screen calls.

d$.$ A word processor provides a template for assembling text books$--$ title page, table of contents, chapters, references, index. But not the actual content.

e$.$ A military drone needs the ability to quickly change its mission from attack to rescue to observe etc.