Answer:
1.
yo vivo
tu viven
2.
yo tengo
tu tienes
3.
yo hago
tu haces
4.
yo viajo
tu viajas
Explanation:
Only for ar, er, and ir verbs
For yo (I) form, take away the last 2 letters and replace with an -o.
For tu (you) form, take away the last 2 letter and add -as (for ar verbs)or -es (for er or ir verbs)
Note: hacer is an exception for yo form