Digital Signal Processing For the given system by differences equation: ()−5/6(−1)+1/6(−2)=(−3)

1.
a. Find the transfer function.
b. Draw the ROC.
c. Is the filter causal? Explain your answer.
d. Is the filter stable? Explain your answer.
e. Find the system impulse response.
f. Is the furrier transform exists? Explain your answer

If 1 km = 0.621 miles, how many miles are in a centimeter

Aschool typically sells 500 yearbooks each year for 50 dollars each. the economic calls does a project and discovers that they can sell 100 more yearbooks for every $5 decrease in price. the revenue for yearbook sales is equal to the number of yearbooks sold times the price of the yearbook. let x represent the number of $5 decrease in price. if the expression that represents the revenue is written in the form r(x)=(500+ax)(50-bx). to maximize profit, what price should the school charge for the yearbooks? what is the possible maximum revenue? if the school attains the maximum revenue, how many yearbooks will they sell?

Can someone me my sister? she is in third grade. 50 points and brainlist! ones that are not answered. plz and thx!