Open (exclusive) whenever the sign is > and <.Closed (inclusive) whenever the sign is and . Goes to the left if the letter has the less than(#>c, c<#) or the less than and equal to(#c, c#) sign points towards it. Goes to the right if the letter has the greater than(#<c, c>#) or the greater than and equal to(#c, c#) sign points towards it. For the first part of the the questions just move all of the numbers to one side and the variables to the other.