The students' scores in an English exam can be represented by a random variable that follows the normal distribution 𝑁(60,152)�(60,152). (※Although the random variable takes discrete values, to make our discussions easier, here we take it as a continuous random variable.) Totally 300 students took this exam. Answer the following questions. We select one student randomly. The probability that the score of the student is 80 or higher is ___ (enter a decimal number and round the number to two decimal places.) Approximately how many students have scores lower than 50? Select the number that is closest to your answer among the following numbers. Approximately how many students have scores higher than 30 but lower than 60? Select the number that is closest to your answer among the following numbers. The students whose scores are among the highest 10% can get grade A+. At least how many points must a student get to get grade A+?