In October 2020 Andrés Vicente Arévalo started his PhD thesis at the IAC, with Tanausú del Pino Alemán, María Jesús Martínez González and Jiri Stepan as his thesis advisors. The topic of his thesis is the inversion of Stokes profiles to infer the physical properties of chromospheric plasmas. This requires taking into account the Hanle and Zeeman effects. Therefore, Andreu is contributing to the development of WP-5 and WP-6.