Calculate the present equivalent value (P) for each of the following cash flow profiles. a) (15 points). t=0 t=1 t=2 t=3 t=4 t=5 t=6 $2,500 $3,000 $3,500 i= 10% $4,000 $4,500 $5,000 $5,000 b) (10 points). $1,900 $1,350 i= 8% per year for the first two years, While i= 12% per year for the following to t=1 t=2 t3 t=4 t=5 three years. $550 $700