Rail Vikas Nigam (RVNL) has given Larsen and Toubro Construction (L&T) an Rs 2,447 crore contract to design and construct the Kolkata underground metro project in the city's Joka-Esplanade Metro Corridor. According to an L&T press statement, the major works for the project include the design and construction of the Ramp and Underground Metro railway works from Mominpur to Esplanade, covering a distance of 5.05 km. The works comprise constructing four underground stations, namely Khidderpore, Victoria, Park Street, and Esplanade, along with tunnels created using Tunnel Boring Machine (TBM) and Cut & Cover methods. The scope of the contract also includes architectural finishing works, track works, and other related activities. (Source: https://www.indianarrative.com/economy-news/rs-2447-crore-project-to-buildkolkata-metros-4-underground-stations-goes-to-lt-149218.html).Discuss in brief the different activities executed during the project life cycle of the Kolkata underground metro project