Part One:Research and summarise ONE of the key challenges listed below, identified in the Treasury report on Moodle:•Mistrust between the public sector and industry is contributing to poor outcomes;•Special contract conditions are unfair, not well understood, and give a false sense of security;•The use of time bars is unacceptable, and contractors are not being paid for variations; or•Risk transfer is unsustainable and aggressive.Reference should be made to clauses from NZS3910: 2013 (but should not be quoted verbatim)to assist you, and provide one case study (sourced online) from the construction industry as anillustration of current practice with regard to your chosen challenge Part Two:(a)Compare and contrast NEC4 and NZS3910:2013 forms of contract with regard to progresspayments. Prepare a flow chart demonstrating the time lines associated with progress payments fromsubmittal to payment , with brief commentary on each timeline(b)(i) Write one brief paragraph explaining the key differences between NEC4 and NZS3910:2013on each the following areas .:•First payment claim process•Final payment claim process•Deductions which can be made to a payment claim from late submittal of information•Time frames for which claims, processing and payments can be made•Advanced payments(ii)Choose one of the contract forms, and explain your preferred method of contract, with reasons15why the alternative is not suitable