solve all subtasks. dont provide partial solutions. write all identities who are you using in your calculus. tnx

a) FETERMINE tite AUTOCORRELATION FUNCTION FOR THE SIGMAL: x(t)=e3tu(t). b) FOR A RANDOM VARIABLE X, WITICH IS DESCRIBED BY A PROBABILITY DEMSITY FUNCTIOM: fx(x)={cx2,0,x1otiterwIse DETERMINE: 1) THE VALUE OF CONSTAMT C 2) MEAM VALUE amd Variance 3) P(x21) c) Determine the meam value of the ramdoM process X(t)=Acos(2fct+),U(0,2)ANDU(0,)