$1-$ Write a format to invitation to bid that include all the element needed, knowing that the project is the construction of a school in Attil the client $($Ministry of education$)$ and the finance are different the location to obtain document is in the directory of education of your city and submit document are in the Ministry of education $-$ Ramallah, the last date for submit the project is the next day of your exam date at $12$:$00$ pm$.$

Knowing that the estimated cost of the project is $200,000$$ and they shall submit a fix bid bond equal to $2\mathrm{.}5\%$ of the estimated amount, the price of obtaining the bid is $150$$ where the contractor shall be certified as classification A in construction of building.

$2-$ how to find out if the contractor used unbalanced contract pricing