Please include all unit conversions clearly

Flat roof buildings are a popular architectural style in dry climates because of the economy of materials of construction. However, during the rainy season, water may pool up on the roof decks, causing potential building collapse if the building was not designed adequately. If 15cm of water accumulates on a 10m by 10m area during heavy rainstorm, determine the following. Show all answers in AES units. a) The total added mass from the standing water the building must support. b) The total added weight from the standing water the building must support. c) A pressure gauge is placed on the roof of the building, under the accumulated water. i. What is the pressure reading in psig? ii. What is the pressure reading in psia