Please show formula used and show all workings

Mogan issd 12-year honds at a coupon rate of 12 percent. T mturity on thrse bods is also 10 percent What is the current bond Ouestion 4-10p B Company Help them to rank the projiects from least risky to highest risik following proets however they are trying to determine which is least risky to undertake. can do the projcts Projects Returns (Expected Value) Standard Deviation $240,000 $580,000 $170,000 $150,000 $450,000 $140,000 $250,000 $130,000