Suppose that x is the yield to maturity with continuous compounding on a zero-coupon bond that pays off $1 at time T. Assume that x follows the process
![](https://book.transtutors.com/qimg/b4291873-6d0a-4231-a1e9-a2d641789f67.png)
Where a, x0, and s are positive constants and dz is a Wiener process. What is the process followed by the bond price?