$1.$ Your workplace is undergoing a transition to a new office building. As the Health & Safety Executive, part of your responsibilities involves designing an ergonomic open$-$plan office for the new space. You must prepare a proposal to present to the top management. Essential details needed in your proposal include:

$($a$)$ Elaborate on the factors of the physical working environment that should be considered when assessing the suitability of the workplace for workers$$ safety and health.

$(10)$

$($b$)$ Explain the features of neutral sitting posture and suitable seating design for office workers.