How to calculate involuntary unemployment?

[RichaS]

I suppose the answer's are a) l=16 and  b) is l=9 so I=36+4*9=72.
But how do we calculate the involuntary unemployment?

Is it 16-9=7?

[Abhitesh]

Involuntary unemployment is the L_s - L_d.
The answers are correct.

[Asd1995]

Hi,

Could you clarify your solution of the second part?

Solving the firm's optimising condition,

p*24sqrt(l)-4l is to be maximised which gives p=sqrt(l)/3, so purchases=revenue=8l

so that gives us 4l=earninngs=36 plus purchases=36 plus 8l,, which is redundant.

Help me out please?