In spanish what are the present tense verbs for to compete considered to be stem changing verbs

Use your knowledge of the imperfect preterit, present, and future tenses to write a post card to a friend in colombia (remember to use all your skills in the three tenses). tell your friend about what you did last summer, what you are doing today and the things you plan to do next fall.

Answer these simple questions for me. number them also do it will be easy for me. don’t put random words.

Mecanice un salón de belleza juna oficina vecinos periodista mujer cartero bombers un hospital me gusta mi baro porque me realizan trabajos muy interesantes