Asmall-business owner must hire seasonal workers as the need arises. the following list shows the number of employees hired monthly for a 5-month period. 4, 13, 5, 6, 7 calculate the standard deviation of the data. round the answer to the nearest hundredth. 35.63 12.36 7 3.16

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0