For the following three models,

(a) xt = 8/3 xt−1 + xt−2 + wt + 7/6wt−1 + 1/3wt−2
(b) xt = 2/3 xt−1 + wt + 5/2wt−1 + wt−2
(c) xt = 9/4 xt−1 + 9/4 xt−2 + wt − 3wt−1 + 1/9wt−2 − 1/3wt−3

address the following:
• Check for parameter redundancy.
• What are the values of p and q for the ARMA(p, q) model?

Which of the following is an easy way to remember the modified “x” tire rotation? a. nondrive wheels straight, cross the drive wheels b. drive wheels straight, cross the nondrive wheels c. drive wheels crossed, nondrive wheels straight d. drive wheels crossed, nondrive wheels crossed

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way

Air at a pressure of 1atm and a temperature of 40 c is in parallel flow over the top surface of a flat plate that is heated to a uniform temperature of 120 c. the plate has a length of 0.40m (in the flow direction) and a width of 0.15m. the reynolds number based on the plate length is 50, 000. what is the rate of heat transfer from the plate to the air? if the free stream velocity of the air is doubled and the pressure is increased to 10 atm what is the rate of heat transfer?