Who in the following situations is resorting to stereotyping?

*Alicia was finding it difficult to get a job because she was 50 years old and companies seemed to prefer younger candidates.
*Jennifer did not employ non-white people in her company.
*Marcia, an HR manager, always gave preference to disabled people when interviewing suitable candidates.
*Navin did not want to share his apartment with non-Indians because he was more comfortable with his own ethnic group.
*Wong’s manager Rachel assumed that Wong was hardworking because he was Chinese.