Funding Information: This study received support from Portuguese funding provided through the Centre for Mathematics via the following projects: DOI 10.54499/UIDP/00013/2020 , DOI 10.54499/UIDB/00013/2020 , and the Portuguese Foundation for Science and Technology (FCT), Portugal through the Individual PhD Scholarship PD/BD/150535/2019 , the research grant UIDB / 04292/2020 , and the project PTDC/MAT-STA/28243/2...