please answers the questions

1. (Total: 25 points) Environ Systems is a firm that specializes in cleaning environmental damage (waste disposal) and specialty chemicals. As part of its expansionary plans, it has made a large issuance of 10 -year corporate bonds, with a ach and an annual coupon rate of 12%. (a) (10 points) Assuming a discount rate of 7% calculate (b) (15 points) Environ got into deep financial troubles and defaulted on (ie: stopped paying) its bonds During that year, Environ negotiated with bondholders on a debt restructuring deal which included extending the maturity of the bond 2 extra years (ie: from 10 years previously to 12 years), a full relief from coupon payments in years 7 and 8 , a payment of coupons at a reduced rate of 3% per annum from years 9 to year 12 , and a repayment of 70% of the face value in vear 12 . Under such conditions and assuming a discount rate of 7%, what would the What would the bondholder's profit/loss be relative to the face value of the bond? 2. (10 points) Find the derivative of: y=5x1+6x+2 3. (15 points) Find the stationary point(s) of the following function. Identify the local maximas, minimas and inflection points (if any). f(x)=(4x2+1)(x1) 4. (10 points) Find the integral of: 2x(x2+1)2dx