What are the formulas on a TI BA II Plus to figure out the Current Yield, YTM, and Bid-ask spread from a U.S. Treasury Quote of: Maturity = 02/15/2037, Coupon = 4.750, Bid Price = 137.3047, Asked Price is 137.3672, Change = -0.0625, and Asked Yield is 2.521. (Some of the answers that I got were) Current Yield: a. 2.52%, b. 4.75%, c. 2.35%. YTM: a. 4.750%, b. 2.521, c. 6.250. Bid-ask spread: $6.250, $3.063, $0.063.