A process has $5$ steps: Step $1$ has a capacity of $7$ units$/$min$.$ Step $2$ follows step $1$ and has a capacity of $5$ units$/$min$.$ Step $3$ follows step $2$ and has a capacity of $12$ units$/$min$.$ Step $4($capacity $8$ units$/$min$)$ is completed at the same time as step $1($it doesn't follow any other step$).$ When it is completed, its output is combined with the output from step $3$ in the last step, Step $5.$ In Step $5$ the final product is assembled, taking a unit from step $4$ and a unit from step $3$ and snapping them together. Step $5$ has a capacity of $12$ units$/$min$.$What is the total capacity of this system? If you could increase the capacity of only one step, which step would you choose and by how much would you increase its capacity?$12$ units$/$min current capacity. Increase Step $4$ by $4$ units$/$min$8$ units$/$min current capacity. Increase step $2$ by $3$ units$/$min $20$ units$/$ min current capacity. Increase Step $4$ by $4$ units$/$min $8$ units$/$min current capacity. Increase Step $4$ by $4$ units$/$min $12$ units$/$min current capacity. Increase step $5$ by $8$ units$/$min$5$ units$/$min current capacity. Increase Step $2$ by $2$ units$/$ min