please explain step by step . explain everything . go slowly . don't skip steps. studying for my final I have in 3 weeks

Draw a diagram showing the variation of an investor's profit and loss with the terminal stock price for a portfolio consisting of: (a) One share and a short position in one call option (b Two shares and a short position in one call option (c) One share and a short position in two call options (d) One share and a short position in four call options In each case, assume that the call option has an exercise price equal to the current stock price