Chem quick MC question

[uni_student]

Does anyone know the answers to these two MC questions?

1. The gas in the gas bulb of an open-ended manometer has a pressure of 500 mm Hg when the atmospheric pressure is 760 mm Hg. The gas bulb is on the LHS and the open end of the manometer is on the RHS. The level of the mercury in the column is:     
a. 500 mm lower on the LHS     
b. 260 mm lower on the LHS     
c. 760 mm lower on the RHS   
d. 260 mm lower on the RHS

2. A second portion of gas, with a pressure of 400 mm Hg is added to the gas bulb in question 6. The level of the mercury after the additional of gas is:
   
a. 140 mm lower on the LHS     
b. 400 mm lower on the LHS     
c. 140 mm lower on the RHS
d. 240 mm lower on the RHS

thank you so much to whoever can help me!

[uni_student]

Bump! Please help!