Please show me the solution as possible for me to know how to do it

For the 3 items below: During the blind auditions of The Voice Teens Ph, a reality television singing contest, the four coaches may turn their chairs for a particular singer and the singer will choose who will be his/her coach. Below is the partial probability distribution of the number of coaches who turned their chairs (X) at any singer. X 0 2 4 PIX=x] 0.30 0.30 0.20 0.10 The probability that at most two coaches will turn is equal to 0.80 0.60 0.40 0.20 The expected value of X is equal to * O 0.9 1.0 O 11.1 1.4 On the average, the number of coaches who turned their chairs at any singer deviates from its mean by 1.28 O 1.64 3.6 O 2.2