1. The problem statement, all variables and given/known data Consider the random process X(t)=A+N(t), where A is a constant and N(t) is a white Gaussian noise with spectral density equal to 1. The process X(t) is filtered with a system with impulse response h(t)=u(t)exp(‐t/T). Compute the probability that X(t), once filtered, is included in the interval [0.25A, 1.15A]. I have problems about white gaussian noise. I actually don't know the concept. I appriciate if you help me to figure it out this.