Please help me out with this questions and some explanation

30. Consider the variable X whose distribution is described by the density curve shown below (known as a uniform distribution): h X 4 6 P(4.7 90). 33. Let Z be a standard normal variable (i.e. Z ~ N(0, 1)). What is the value of a such that P(Z > >) = 0.9920? (A) -2.41 (B) -2.07 (C) -1.97 (D) -0.02 (E) 2.39 34. What is the proportion of the area under the standard normal curve corresponding to the interval -0.63