Translation:I am old, I am a failure.
I'm old, I'm a failure. I am old, I am a failure.
What I put: I'm old, i am a failure.
Seriously, duo, if you're going to have two versions of the verb "to be", you have to be ready for all the possible answers.
I was confused why this is "I am (right now) old, I am (always) a failure" and then looked up ser vs. estar again, and http://www.spanishdict.com/answers/100040/ser-and-estar has a helpful "Meaning Changes With Ser and Estar" for a couple of adjectives. So actually this means "I look old, I am a failure"?!