Please answer both questions

Prob. 13. Use the notation in the text, prove that B? is given by the formulas V? ()V(2) relli, ti+1) V? (3) - V:41() [V? (2) - 1+1:41()] 1 [ti+1, bi+2) B? (2) = [1-V31(x)] [1 - V12()] reli+2, ti+3) 0 elsewhere 5. Prob. 1. Verify this formula for B? (t;): to-t; 1 8i+1.3 13+1 -13-1) where 8x1 = 1 if k=1, and dk1 = 0 if k #l. t+1-t t;+1 -13-1 25 Hint: Use the above problem. Prob. 13. Use the notation in the text, prove that B? is given by the formulas V? ()V(2) relli, ti+1) V? (3) - V:41() [V? (2) - 1+1:41()] 1 [ti+1, bi+2) B? (2) = [1-V31(x)] [1 - V12()] reli+2, ti+3) 0 elsewhere 5. Prob. 1. Verify this formula for B? (t;): to-t; 1 8i+1.3 13+1 -13-1) where 8x1 = 1 if k=1, and dk1 = 0 if k #l. t+1-t t;+1 -13-1 25 Hint: Use the above