Consulting Service For The Formulation Of The Pre-Investment Study At The Level Of Technical Sheet Of Low And Medium Complexity Of The Project: "Improvement Of The Water Supply Service For Irrigation In 3 Production Units 3 Districts Of Three Pro - Consulting Service For The Formulation Of The Pre-Investment Study At The Level Technical Sheet Of Low And Medium Complexity Of The Project: "Improvement Of The Water Supply Service For Irrigation In 3 Production Units 3 Districts Of Three Provinces Of The Department Of Ayacucho"