How many joists do i need for a 10×10, 12×12, 8×10 & 10×12 deck

How many 2×6 do i need for a 10×10, 12×12, 8×10 & 10×12 deck

How many deck boards do i need for a 10×10, 12×12 & 16×16 deck

How many steps for a 3′, 4′, 5′ and 6 foot high deck

How many footings do I need

How many deck post do I need