Question How much time should a contractor allow on their contract program for the laying of bricks for double face brick wall $1,8$ m high and $176$ m long using two fairly competent bricklayers who are supported by sufficient labourers to ensure that the bricklayers focus on the actual bricklaying. The shift starts at $07$:$30$ and ends al $17$:$00$ with a $1$ hour lunch break from $12$:$00$ to $13$:$00.$ No weekend work is allowed on this site. Show your calculations in detail and make use of realistic assumptions$$where$$required$.$