How to find the intensity of the current i4 ?

Please help!

Two particles of masses m and 2m are placed on a smooth horizontal table. a string, which joins these two masses, hangs over the edge supporting a pulley, which suspends a particle of mass 3m.the pulley has negligible mass. the two parts of the string on the table are parallel and perpendicular to the edge of the table. the hanging parts of the string are vertical. find the acceleration of the particle of mass 3m.

What type of light does this light bulb produce most (i.e. at what wavelength does the spectrum have maximum intensity)?

How will the system respond to a temperature increase?