The following table lists the probability distribution of x, where x represents the number of monthly absences of workers of a small construction firm, along with P(x), its corresponding probability. X P(x) xP(x) x2P(x) 0 .25 .35 2 a .12 a) Find the numerical value of P(2). b) Complete the above table. c) Use your table to calculate the following parameters of this probability distribution: i) Mean. Standard deviation