Suppose yt = 4 + 3t + xt where {xt} is a zero-mean time series with autocovariance function γk.(a) find the mean function for {yt}.(b) find the autocovariance function for {yt}.(c) is {yt} stationary? why or why not?

Any greatly appreciated! you in advance. jody bought 20 shares of amazon at the close price of $121.00. she bought 20 more shares a year later at the price of $127.00. two years later she's sold all of her shares at the price of $133.00. her broker charges $50 for each transaction. after all of these transactions how much money did jody make? a.$65.00b.$5288.00c.$210.00d.$310.00

Sawsan recorded the favorite sport of students at her school. she surveyed 200 students. how many students chose tennis?

Calculate the total payback for a $3,500 loan at 8% annual interest with monthly payments for two years. show all of your steps. use the formula, m = pm(1 + m)^na/(1 + m)^na - 1, as needed.