For each of the following taxpayers, state the dates on which the 2021-22 income tax is due to be paid and calculate the amount payable on each date. (Ignore Class 4 NICs). 

(a) Guy's 2020-21 income tax liability was £1,600, of which £1,150 was paid via the PAYE system and a further £50 was deducted at source from savings income. His income tax liability for 2021-22 is £1,750, of which £1,310 is paid via PAYE and none is deducted at source. 

(b) Marie's 2020-21 income tax liability was £6,730, of which £4,370 was paid via PAYE and £20 was deducted at source. Her 2021-22 liability is £6,580, of which £4,810 is paid via PAYE and £35 is deducted at source. 

(c) Majid's 2020-21 income tax liability was £14,850, of which £11,990 was paid via PAYE and £110 was deducted at source. His 2021-22 liability is £16,110, of which £12,510 is paid via PAYE and none is deducted at source.