Consider a risk$-$neutral investor which is faced with the following two investments for their $$1,000$:

$-$ a riskless $($or risk$-$free$)$ bond paying a interest rate i$=3\%$

$-$ A risky bond, which may pay back with probability $90\%,$ and not pay with probability $10\%$

What is the risk premium x that the risky bond should pay?