Can I get some help with this assignment question? I need the answer by 4 PM. Thank you.

4. (26 pts) A firm has a production function given by, Q = f(L) = 1+ L-1 where L > 0 is the number of workers used for the production. Let p be the price of the product and w be the wage per unit of labor. (a) Show that this production function is strictly monotonic and strictly concave for L > 0. Give an economic interpretation of these two characteristics (i.e., monotonicity and concavity). (b) Find the profit-maximizing labor demand L* and show that labor demand is downward sloping. Do you have a unique profit-maximizing labor demand L*? Why or why not? (c) Find the wage elasticity of labor demand. Under which condition on w and p is the elasticity elastic? (d) If p = $1 and w = $0.25, find the equation of the line tangent to the production function at the level of labor _*