In which type of vascular bundles are xylem and phloem present at the same radius?

When the 'intrafascicular cambium' is present within the vascular bundle,the vascular bundle is called ........

Stomata are the component of

$A$ vascular bundle in which two patches of phloem are present on both sides of the xylem is called:

The large empty colourless cells seen on the upper epidermis in grasses which facilitate the curling of leaves to minimise water loss are . . . . . .

The fatty substance found on the epidermal cell walls is .......