I need the answer but also how to work this problem

It is generally believed that nearsightedness affects about 8% of children in a certain region. A school district tests the vision of 172 incoming kindergarten children. How many would be expected to be nearsighted? What is the standard deviation for the P number of nearsighted children in this group? . . . . . 0 & It would be expected that of the tested children are nearsighted. essil (Round to two decimal places as needed.) chas The standard deviation is about (Round to two decimal places as needed.) mmu