Operations management is part of a production system consisting of: Inputs $-$ Processing $\{$i$.$e$.$ Transforming$\}-$ Outputs. Which of the following examples depict accurately this production system?

a$.$ Airline: pilots $-$ planes $-$ transportation

b$.$ Bank: Teller $-$ computer equipment $-$ deposits

c$.$ Furniture manufacturer: Wood $-$ sanding $-$ chair

d$.$ Telephone company: satellites $-$ cables $-$ telecommunication