are to repair

[Azz]

Can one say
a. The toolbox in the trunk is to repair the car if it malfunctions.
b. The toolbox in the trunk is so that you can repair the car if it malfunctions.

c. The tools in the trunk are to repair the car if it malfunctions.
d. The tools in the trunk are so that you can repair the car if it malfunctions.
?

Many thanks.

[Luschen]

I think all are correct. A toolbox is understood to mean the box along with the tools that are inside it.