QUESTION 1 Identify four tasks in addition to relay switching operations that PLCs are capable of performing. O Timing, counting, calculating, composing.. O Timing, counting, calculating, cleansing. O Timing, reading, calculating, comparing. O Timing, counting, calculating, comparing. QUESTION 2 State two ways in which I/O is incorporated into the PLC.

Please do number 4

F2 * Please use the accompanying Excel data set or accompanying Text file data set when completing the following exercise. An article in the ASCE Journal of Energy Engineering ("Overview of Reservoir Release Improvements at 20 TVA Dams," Vol. 125, April 1999, pp. 1-17) presents data on dissolved oxygen concentration from streams below 20 dams in the Tennessee Valley Authority system. The sample mean from the observations is X 3.272 and the sample standard deviation is s = 2.130. Assume population is approximately normally distributed. Round your answers to 2 decimal places. = (a) Calculate the 95% two-sided confidence interval on the mean oxygen concentration. 2.29 i -1.2736 SUS 4.28 (b) Calculate the 95% two-sided prediction interval on the dissolved oxygen concentration for the next stream that will be tested. (i -3.6752 7.8456 (c) Find an interval that will contain 95% of the values of the dissolved oxygen concentration with 99% confidence. @ 3 # 80 F3 000 F4 $ 4 i 10.2472 75 %…

Design  a +40 volt dc  power supply for your sound system.  Your sound system requires  a 400 watt capability.     The power supply is energized from a three-wire 110 Vrms  60 Hz power line that meets the National Electric Code (NEC).  The system  block diagram and design specifications  are given below.    Input is a 110 Vrms60 Hz. Output voltage is 40 volts, unregulated. Maximum allowable ripple is 2% Use a full-wave bridge rectifier. Use a transformer Assume diodes with VF= 0.7  volts   Your design should include: Ø Well-labeled circuit diagram of what goes in the “Your Design” box.  There should be enough detail such that someone could build an operational  prototype.  Polarities of key components are important Ø Key design equations and supporting calculations.  Show your work! Ø Component specifications including: (a)            Transformer-turns ratio (b)           Effective value of the audio system load resistor (speaker impedance)  and load current for a 400 watt, 40 volt…