Using value chain analysis, which primary activities would you consider to be most and least valuable for a company like Facebook? $($choose two answers$).$

a$.$ Facebook's resource weaknesses include its primary activities such as supply chain management, distribution, and service.

b$.$ Facebook's resource weaknesses include its primary activities such as General Administration.

c$.$ Facebook's resource strengths include its primary activities such as Product R&D$,$ Technology and Systems Development.

d$.$ Facebook's resource weaknesses include its primary activities such as human resources management.

e$.$ Facebook's resource strengths include its primary activities such as supply chain management, distribution, and service.

f$.$ Facebook's resource strengths include its primary activities of operations and sales and marketing.