I am having a difficult time with these practice problems. Any help would be greatly appreciated! TIA!

1.

Two cards are drawn without replacement from a standard deck of 52 playing cards. What is the probability of choosing a spade and then, without replacement, a black card? Express your answer as a fraction or a decimal number rounded to four decimal places.A certain insecticide kills 70 % of all insects in laboratory experiments. A sample of 12 insects is exposed to the insecticide in a particular experiment. What is the probability that exactly 3 insects will die? Round your answer to four decimal places.Decide which of the following statements are True. Answer 2 Points Tables Keypad Keyboard Shortcuts The standard deviation of a standard normal distribution is always 1. O For any normal distribution, only the mean and mode are equal. The median is different from the mean and mode. O There are an unlimited number of normal distributions. O The y-axis is a vertical asymptote for all normal distributions