Solution

Problem 1. M1,L1,J1,N1,O2,O1,P1,M1,P2

Problem 2. Snapback (N4)

Problem 3. Defence first ( P3,S1,T2,T3,Q1).

Problem 4. P1,Q4,N2,Q3,N1

Problem 5. Heart mark (J10,K10,J11,J8,L8) !