Given: < 2 and < 3 form a linear pair, < 1 and < 3 are vertical angles, and m< 1,m< 4, and m< 5 form a straight angle

Attached is the drawing that shows that

1, 4, and 5 form a straight angle (straight line)2 and 3 form a linear pair (next to each other and create a straight line)1 and 3 are vertical angles (opposite sides of the X)

20000 as first it increases by 2500 then by 5000 so next it will increase by 10000