modification and questions

Thanks for the great first solution! I have a modification and questions:

Equation no. 1

Please note the change in the red part:

m= starts at 0 to the value of L (which is 30) that's for the summation part.

So m in the equation should be assumed from (0 to 30)

L=30,    ,    ,   p is probability

My project is based on the value of L so I need to assume a range for L (for example a range of 30-60 with step of 5) and I need to graph S against L for each value of L (it can be either in a separate graph or the same one).

So, I was hoping that I get a file where I give the value of L and it will do calculations and graph it and then I would enter another value for L and it will do the calculations and graph it again etc.

Equation no. 2

Same thing for this equation. The project depends on the values of L. so I need to assume a range for L (for example a range of 30-60 with step of 5) and I need to graph V against L for each value of L (it can be either in a separate graph or the same one).

So again , I was hoping that I get a file where I give the value of L and it will do calculations and graph it and then I would enter another value for L and it will do the calculations and graph it again etc.