2. Evaluate the following expressions: (4 points) (a) 2+5 2-5 (c) 2+ (5 2)-5 (d) (2+ 5) 2-5 3. Convert the following algebraic equations into Fortran assignment statements: (4 points) 1. 2. 4. How many times are the loops, defined by the following statements, executed: (9 points) a) DOI- 2, N/2, 3 with N having the value 2. with N having the value 2 with N having the value 2 c) DO 1- 3, N"2, 5