Answer
15
Work Step by Step
The first step can be done $1+2=3$ possible ways.
the second step can be done $2+2+1=5$ possible ways
The total number of the possibilities is the product of these : $3*5=15$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.