Prove the validity of the following arguments: “Every laptop has an internal disk drive. Some laptops have a DVD drive. Therefore, some laptops have both an internal disk drive and a DVD drive” Use...

Prove the validity of the following arguments:

“Every laptop has an internal disk drive. Some laptops have a DVD drive. Therefore, some laptops have both an internal disk drive and a DVD drive”

Use L(x): x is a laptop,

I(x): x has an internal disk drive,

D(x): x has a DVD drive