kindly help with this problems and see attachment below for Excel spread sheet questions

Cece Equestrian Tours is evaluating 2 mutually exclusive projects. The probabilities of the different project returns are shown below. 1. Calculate the expected NPV. Which project is better? 2. Calculate the variance and standard deviation. Now which project is better? 3. Calculate the coefficient of variation and the probability of negative return. Does this change your decision? Cece Equestrian Tours NPVA Probability 15% (34,000) 20% (8,500) 30% 17,000 20% 42,500 15% 68,000 Expected NPV Variance Standard Deviation Coefficient of Variation Prob(NPV