Please help! :/ The dimensions of a rectangular prism are shown below:

Length: 1 1/2 feet
Width: 1 foot
Height: 2 1/2 feet
The lengths of the sides of a small cube are 1/2 foot each.

Part A: How many small cubes can be packed in the rectangular prism? Show your work.

Part B: Use the answer obtained in part A to find the volume of the rectangular prism in terms of the small cube and a unit cube.

Correct answers: Brainliest and a Thanks!
Incorrect answers: 1-2 star (Make sure you know the answers please!)
Improper answers: Reported and 1 star (No links!!)