Three new cases of the novel coronavirus Covid-19 have been confirmed in Singapore, while another patient has been discharged from hospital.Two of the new cases are linked to the cluster at Grace Assembly of God, which now has 18 cases. The other new infection is linked to a previous case.The total number of confirmed cases in Singapore is now 75, while 19 have recovered, the Ministry of Health (MOH) said in a media statement on Sunday.Of the 56 confirmed cases still in hospital, most are…