exam therapy

i wasted so much time trying to work out the the asset beta.I am not an actuarist or a maths expert so i think it was quite unfair to to waste so much time trying to figure out the beta ..usually tis information is listed and and if not enough training should be given in the study materials if they require students to predict asset betas….i took 0.4 asset beta..this represents 40 percent of the business then i worked it to 100 percent to include the 60 percent of the other business…has anyone got an idea…the cost of equity and wacc can only be calculated onmrket values and the share price was not given…i would ppreciate admins response..?