Your water purification company is planning to introduce a new product that will desalinate and purify enough water for a small village's daily needs using 100% renewable energy sources. Your business plan is for the new product to be released in 180 days. There are 4 main tasks that must be accomplished, in series, before the produ can be marketed and sold. You estimate an optimistic, most likely and pessimistic amount of time for each of these activities as follows: Based on your estimates, calculate the probability that the product will be available for marketing and sales within 180 days