what is minimum sampling frequency to be satisfied to prevent aliasing if signal frequency is 1.5answer in box must be upto 2 decimal places

Assume the sampling rate is 20000 Hz, sinusoid signal frequency  is 1000 Hz. Calculate the zero crossing value for 100. Choose correct option from the following:Select one:a. 200b. 10c. 20d. 100

Assume the sampling rate is 20000 Hz, sinusoid signal frequency  is 1000 Hz. Calculate the zero crossing value for 100. Choose correct option from the following:Select one:a. 10b. 20c. 100d. 200

Assume the sampling rate is 20000 Hz, sinusoid signal frequency  is 1000 Hz. Calculate the zero crossing value for 100. Choose correct option from the following:Select one:a. 20b. 200c. 10d. 100

Assume the sampling rate is 20000 Hz, sinusoid signal frequency  is 1000 Hz. Calculate the zero crossing value for 100. Choose correct option from the following:Select one:a. 10b. 20c. 200d. 100

While considering buying advertising spots during television programming on a certain nes-work, an online retailer asks the television network to estimate the percentage uf its viewers who purchase goods online. The television network has several million viewers. The online retailer requires the estimate to have a margin of error of at most three percentage points with a confidence level of 99%. Of the following, which is the smallest sample size that the television network can select to meet the online retailer's requirement? (A) 30 (B) 1070 (C) 1510 (D) 1850 (E) At least 10% of the network's viewers