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please tell me I am clueless

What percent of the butterfly tents contain at most 10 cocoons

Arandom sample of 45 observations results in a sample mean of 68. the population standard deviation is known to be 23 a. compute the margin of error at a 959% confidence interval. b. compute the 95% confidence interval for the population mean c. compute the 90% confidence interval for the population mean. d. compute the 75% confidence interval for the population mean

Which pair of lines is parallel? a. y= -2x+4 and y=2x-1 b. y= 1/2x-1 and y= 1/2x+10 c. y= x+3 and y= -2x+3 d. y= 3x+5 and y= 1/3x+2