im new to economics please help :) !

Supply: All of the curves that we represented in class can be described mathematically using functions. Let's consider a production process that does not have an initial phase of Increasing Marginal Product and Decreasing Marginal Cost. From the very first unit of output produced, the following units will be more and more costly to produce. Dunder Mifflin Paper Company, Inc. knows this hard reality of the paper industry. In their case, sales, not production, get harder and harder as quantities increase. The MC curve for this firm could look like a straight line, with positive slope, and positive intercept. Let's say that it can be described by the equation P =0.8 x Qs + 10 , where P is expressed in US dollars and Qs is expressed in output units. . Plot the graph of this MC curve . Given a market price of $15, calculate the optimal supply Qs . Given the same market price, calculate the producer surplus . The firm's best employee is going on maternity leave for one year starting tomorrow. What will happen to the supply curve? . The firm found a new sales pitch technique to cut the negotiation time with clients by a half. What will happen to the supply curve