If a variable takes the discrete value `alpha+4,` `alpha-7/2, alpha-5/2, a-3,alpha-2, alpha+1/2, alpha-1/2,` `alpha+5(alpha>0),` then the median of these values:

If a variable takes the discrete values alpha-4 , alpha -(7)/(2), alpha-(5)/(2), alpha-2,alpha+(1)/(2), alpha-(1)/(2), alpha+5(alpha gt 0) , then the median is

If a variable takes the discrete values alpha-4 , alpha -(7)/(2), alpha-(5)/(2), alpha-2,alpha+(1)/(2), alpha-(1)/(2), alpha+5(alpha gt 0) , then the median is

If a variable takes the discrete values alpha+4 , alpha-(7)/(2), alpha-(5)/(2), alpha-3, alpha-2, alpha+(1)/(2), alpha-(1)/(2), alpha+5 (alpha gt 0) then the median is

If a variable takes the discrete values alpha+4 , alpha -(7)/(2), alpha-(5)/(2), alpha-2,alpha-3,alpha+(1)/(2), alpha-(1)/(2), alpha+5(alpha gt 0) , then the median is

If a variable takes the discrete values : alpha + 4, alpha - (7)/(2), alpha - (5)/(2), alpha - 3, alpha - 2, alpha + (1)/(2), alpha - (1)/(2), alpha + 5, (alpha gt 0) , then the median is :

Prove that |{: (1,alpha,alpha^2), (alpha,alpha^2, 1),(alpha^2, 1,alpha) :}|=-(1-alpha^3)^2